25656502781076 has 12 divisors (see below), whose sum is σ = 59865173155872. Its totient is φ = 8552167593688.

The previous prime is 25656502781057. The next prime is 25656502781081. The reversal of 25656502781076 is 67018720565652.

It is a tau number, because it is divible by the number of its divisors (12).

It is a super-2 number, since 2×25656502781076² (a number of 28 digits) contains 22 as substring.

It is a Smith number, since the sum of its digits (60) coincides with the sum of the digits of its prime factors.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1069020949200 + ... + 1069020949223.

It is an arithmetic number, because the mean of its divisors is an integer number (4988764429656).

Almost surely, 2^{25656502781076} is an apocalyptic number.

It is an amenable number.

25656502781076 is an abundant number, since it is smaller than the sum of its proper divisors (34208670374796).

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

25656502781076 is a wasteful number, since it uses less digits than its factorization.

25656502781076 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2138041898430 (or 2138041898428 counting only the distinct ones).

The product of its (nonzero) digits is 42336000, while the sum is 60.

The spelling of 25656502781076 in words is "twenty-five trillion, six hundred fifty-six billion, five hundred two million, seven hundred eighty-one thousand, seventy-six".