163620250000 has 105 divisors (see below), whose sum is σ = 396753144151. Its totient is φ = 65367200000.

The previous prime is 163620249943. The next prime is 163620250009. The reversal of 163620250000 is 52026361.

The square root of 163620250000 is 404500.

It is a perfect power (a square), and thus also a powerful number.

It can be written as a sum of positive squares in 10 ways, for example, as 163613778064 + 6471936 = 404492^2 + 2544^2 .

It is a Harshad number since it is a multiple of its sum of digits (25).

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (163620250009) by changing a digit.

It is a polite number, since it can be written in 20 ways as a sum of consecutive naturals, for example, 202249596 + ... + 202250404.

Almost surely, 2^163620250000 is an apocalyptic number.

163620250000 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

163620250000 is the 404500-th square number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 163620250000

163620250000 is an abundant number, since it is smaller than the sum of its proper divisors (233132894151).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

163620250000 is an frugal number, since it uses more digits than its factorization.

163620250000 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1656 (or 816 counting only the distinct ones).

The product of its (nonzero) digits is 2160, while the sum is 25.

Multiplying 163620250000 by its sum of digits (25), we get a square (4090506250000 = 2022500²).

163620250000 divided by its sum of digits (25) gives a square (6544810000 = 80900²).

Adding to 163620250000 its reverse (52026361), we get a palindrome (163672276361).

The spelling of 163620250000 in words is "one hundred sixty-three billion, six hundred twenty million, two hundred fifty thousand".