25656101512 has 8 divisors (see below), whose sum is σ = 48105190350. Its totient is φ = 12828050752.

The previous prime is 25656101491. The next prime is 25656101519. The reversal of 25656101512 is 21510165652.

It can be written as a sum of positive squares in only one way, i.e., 15091139716 + 10564961796 = 122846^2 + 102786^2 .

It is a tau number, because it is divible by the number of its divisors (8).

It is a super-2 number, since 2×25656101512² (a number of 22 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (25656101519) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1603506337 + ... + 1603506352.

Almost surely, 2^25656101512 is an apocalyptic number.

It is an amenable number.

25656101512 is a deficient number, since it is larger than the sum of its proper divisors (22449088838).

25656101512 is a wasteful number, since it uses less digits than its factorization.

25656101512 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3207012695 (or 3207012691 counting only the distinct ones).

The product of its (nonzero) digits is 18000, while the sum is 34.

The spelling of 25656101512 in words is "twenty-five billion, six hundred fifty-six million, one hundred one thousand, five hundred twelve".