25715145516771 has 32 divisors (see below), whose sum is σ = 37713005568000. Its totient is φ = 15513400840608.

The previous prime is 25715145516719. The next prime is 25715145516787. The reversal of 25715145516771 is 17761554151752.

It is not a de Polignac number, because 25715145516771 - 2³⁹ = 25165389702883 is a prime.

It is a super-2 number, since 2×25715145516771² (a number of 28 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (57).

It is not an unprimeable number, because it can be changed into a prime (25715145516791) by changing a digit.

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 31 ways as a sum of consecutive naturals, for example, 12697801 + ... + 14583018.

It is an arithmetic number, because the mean of its divisors is an integer number (1178531424000).

Almost surely, 2^{25715145516771} is an apocalyptic number.

25715145516771 is a deficient number, since it is larger than the sum of its proper divisors (11997860051229).

25715145516771 is a wasteful number, since it uses less digits than its factorization.

25715145516771 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 27281583.

The product of its digits is 10290000, while the sum is 57.

The spelling of 25715145516771 in words is "twenty-five trillion, seven hundred fifteen billion, one hundred forty-five million, five hundred sixteen thousand, seven hundred seventy-one".