25151660720 has 20 divisors (see below), whose sum is σ = 58477611360. Its totient is φ = 10060664256.

The previous prime is 25151660717. The next prime is 25151660767. The reversal of 25151660720 is 2706615152.

It is a tau number, because it is divible by the number of its divisors (20).

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 157197800 + ... + 157197959.

It is an arithmetic number, because the mean of its divisors is an integer number (2923880568).

Almost surely, 2^25151660720 is an apocalyptic number.

25151660720 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

25151660720 is an abundant number, since it is smaller than the sum of its proper divisors (33325950640).

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

25151660720 is a wasteful number, since it uses less digits than its factorization.

25151660720 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 314395772 (or 314395766 counting only the distinct ones).

The product of its (nonzero) digits is 25200, while the sum is 35.

The spelling of 25151660720 in words is "twenty-five billion, one hundred fifty-one million, six hundred sixty thousand, seven hundred twenty".