25655614658 has 4 divisors (see below), whose sum is σ = 38483421990. Its totient is φ = 12827807328.

The previous prime is 25655614609. The next prime is 25655614703. The reversal of 25655614658 is 85641655652.

It is a happy number.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in only one way, i.e., 23625841849 + 2029772809 = 153707^2 + 45053^2 .

It is a Curzon number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6413903663 + ... + 6413903666.

Almost surely, 2^25655614658 is an apocalyptic number.

25655614658 is a deficient number, since it is larger than the sum of its proper divisors (12827807332).

25655614658 is a wasteful number, since it uses less digits than its factorization.

25655614658 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12827807331.

The product of its digits is 8640000, while the sum is 53.

The spelling of 25655614658 in words is "twenty-five billion, six hundred fifty-five million, six hundred fourteen thousand, six hundred fifty-eight".