163123421200 has 60 divisors (see below), whose sum is σ = 399298486788. Its totient is φ = 64018240000.

The previous prime is 163123421173. The next prime is 163123421221. The reversal of 163123421200 is 2124321361.

It can be written as a sum of positive squares in 6 ways, for example, as 3222605824 + 159900815376 = 56768^2 + 399876^2 .

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

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 3826051 + ... + 3868450.

Almost surely, 2^163123421200 is an apocalyptic number.

163123421200 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

163123421200 is an abundant number, since it is smaller than the sum of its proper divisors (236175065588).

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

163123421200 is a wasteful number, since it uses less digits than its factorization.

163123421200 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7694572 (or 7694561 counting only the distinct ones).

The product of its (nonzero) digits is 1728, while the sum is 25.

Adding to 163123421200 its reverse (2124321361), we get a palindrome (165247742561).

The spelling of 163123421200 in words is "one hundred sixty-three billion, one hundred twenty-three million, four hundred twenty-one thousand, two hundred".