25420798464528 has 40 divisors (see below), whose sum is σ = 65720795578048. Its totient is φ = 8467096321152.

The previous prime is 25420798464521. The next prime is 25420798464547. The reversal of 25420798464528 is 82546489702452.

It is a happy number.

It is not an unprimeable number, because it can be changed into a prime (25420798464521) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 203160775 + ... + 203285862.

Almost surely, 2^{25420798464528} is an apocalyptic number.

It is an amenable number.

25420798464528 is an abundant number, since it is smaller than the sum of its proper divisors (40299997113520).

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

25420798464528 is a wasteful number, since it uses less digits than its factorization.

25420798464528 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 406447951 (or 406447945 counting only the distinct ones).

The product of its (nonzero) digits is 309657600, while the sum is 66.

The spelling of 25420798464528 in words is "twenty-five trillion, four hundred twenty billion, seven hundred ninety-eight million, four hundred sixty-four thousand, five hundred twenty-eight".