25015016938668 has 48 divisors (see below), whose sum is σ = 60960364152576. Its totient is φ = 7968700175040.

The previous prime is 25015016938661. The next prime is 25015016938673. The reversal of 25015016938668 is 86683961051052.

It is a super-2 number, since 2×25015016938668² (a number of 28 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (25015016938661) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 40043623 + ... + 40663518.

It is an arithmetic number, because the mean of its divisors is an integer number (1270007586512).

Almost surely, 2^{25015016938668} is an apocalyptic number.

It is an amenable number.

25015016938668 is an abundant number, since it is smaller than the sum of its proper divisors (35945347213908).

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

25015016938668 is a wasteful number, since it uses less digits than its factorization.

25015016938668 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 80708294 (or 80708292 counting only the distinct ones).

The product of its (nonzero) digits is 18662400, while the sum is 60.

The spelling of 25015016938668 in words is "twenty-five trillion, fifteen billion, sixteen million, nine hundred thirty-eight thousand, six hundred sixty-eight".