1625722000 has 240 divisors, whose sum is σ = 4673955312. Its totient is φ = 545126400.

The previous prime is 1625721997. The next prime is 1625722013. The reversal of 1625722000 is 2275261.

It can be written as a sum of positive squares in 8 ways, for example, as 907696384 + 718025616 = 30128^2 + 26796^2 .

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

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 5193844 + ... + 5194156.

Almost surely, 2^1625722000 is an apocalyptic number.

1625722000 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 1625722000, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2336977656).

1625722000 is an abundant number, since it is smaller than the sum of its proper divisors (3048233312).

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

1625722000 is a wasteful number, since it uses less digits than its factorization.

1625722000 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 403 (or 380 counting only the distinct ones).

The product of its (nonzero) digits is 1680, while the sum is 25.

The square root of 1625722000 is about 40320.2430548230. The cubic root of 1625722000 is about 1175.8414374274.

Adding to 1625722000 its reverse (2275261), we get a palindrome (1627997261).

The spelling of 1625722000 in words is "one billion, six hundred twenty-five million, seven hundred twenty-two thousand".