25555587088855 has 16 divisors (see below), whose sum is σ = 31726225137600. Its totient is φ = 19738213608960.

The previous prime is 25555587088819. The next prime is 25555587088879. The reversal of 25555587088855 is 55888078555552.

It is not a de Polignac number, because 25555587088855 - 2¹³ = 25555587080663 is a prime.

It is a super-2 number, since 2×25555587088855² (a number of 28 digits) contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 3432210 + ... + 7930399.

It is an arithmetic number, because the mean of its divisors is an integer number (1982889071100).

Almost surely, 2^{25555587088855} is an apocalyptic number.

25555587088855 is a deficient number, since it is larger than the sum of its proper divisors (6170638048745).

25555587088855 is a wasteful number, since it uses less digits than its factorization.

25555587088855 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11378154.

The product of its (nonzero) digits is 4480000000, while the sum is 76.

The spelling of 25555587088855 in words is "twenty-five trillion, five hundred fifty-five billion, five hundred eighty-seven million, eighty-eight thousand, eight hundred fifty-five".