25607772478 has 16 divisors (see below), whose sum is σ = 39165840000. Its totient is φ = 12553638552.

The previous prime is 25607772451. The next prime is 25607772511. The reversal of 25607772478 is 87427770652.

It is a super-2 number, since 2×25607772478² (a number of 22 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 7 ways as a sum of consecutive naturals, for example, 241578 + ... + 331021.

It is an arithmetic number, because the mean of its divisors is an integer number (2447865000).

Almost surely, 2^25607772478 is an apocalyptic number.

25607772478 is a deficient number, since it is larger than the sum of its proper divisors (13558067522).

25607772478 is a wasteful number, since it uses less digits than its factorization.

25607772478 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 573039.

The product of its (nonzero) digits is 9219840, while the sum is 55.

The spelling of 25607772478 in words is "twenty-five billion, six hundred seven million, seven hundred seventy-two thousand, four hundred seventy-eight".