25491452670 has 48 divisors (see below), whose sum is σ = 66365507520. Its totient is φ = 6788722752.

The previous prime is 25491452647. The next prime is 25491452699. The reversal of 25491452670 is 7625419452.

25491452670 is a `hidden beast` number, since 2 + 5 + 49 + 14 + 526 + 70 = 666.

It is a Harshad number since it is a multiple of its sum of digits (45).

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 118950 + ... + 255209.

It is an arithmetic number, because the mean of its divisors is an integer number (1382614740).

Almost surely, 2^25491452670 is an apocalyptic number.

25491452670 is an abundant number, since it is smaller than the sum of its proper divisors (40874054850).

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

25491452670 is a wasteful number, since it uses less digits than its factorization.

25491452670 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 374929 (or 374926 counting only the distinct ones).

The product of its (nonzero) digits is 604800, while the sum is 45.

The spelling of 25491452670 in words is "twenty-five billion, four hundred ninety-one million, four hundred fifty-two thousand, six hundred seventy".