25705670487 has 64 divisors (see below), whose sum is σ = 42114613248. Its totient is φ = 13635216000.

The previous prime is 25705670449. The next prime is 25705670509. The reversal of 25705670487 is 78407650752.

It is not a de Polignac number, because 25705670487 - 2⁷ = 25705670359 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (25705670387) by changing a digit.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 1702662 + ... + 1717692.

It is an arithmetic number, because the mean of its divisors is an integer number (658040832).

Almost surely, 2^25705670487 is an apocalyptic number.

25705670487 is a deficient number, since it is larger than the sum of its proper divisors (16408942761).

25705670487 is a wasteful number, since it uses less digits than its factorization.

25705670487 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 15180.

The product of its (nonzero) digits is 3292800, while the sum is 51.

The spelling of 25705670487 in words is "twenty-five billion, seven hundred five million, six hundred seventy thousand, four hundred eighty-seven".