25202327990 has 64 divisors (see below), whose sum is σ = 52595343360. Its totient is φ = 8516102400.

The previous prime is 25202327989. The next prime is 25202328017. The reversal of 25202327990 is 9972320252.

It is a super-2 number, since 2×25202327990² (a number of 22 digits) contains 22 as substring.

It is a Curzon number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 3319739 + ... + 3327321.

It is an arithmetic number, because the mean of its divisors is an integer number (821802240).

Almost surely, 2^25202327990 is an apocalyptic number.

25202327990 is an abundant number, since it is smaller than the sum of its proper divisors (27393015370).

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

25202327990 is a wasteful number, since it uses less digits than its factorization.

25202327990 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8277.

The product of its (nonzero) digits is 136080, while the sum is 41.

The spelling of 25202327990 in words is "twenty-five billion, two hundred two million, three hundred twenty-seven thousand, nine hundred ninety".