25690045571721 has 96 divisors (see below), whose sum is σ = 39443131728000. Its totient is φ = 16704074119680.

The previous prime is 25690045571693. The next prime is 25690045571759. The reversal of 25690045571721 is 12717554009652.

25690045571721 is a `hidden beast` number, since 2 + 5 + 6 + 9 + 0 + 0 + 45 + 571 + 7 + 21 = 666.

It is not a de Polignac number, because 25690045571721 - 2⁵ = 25690045571689 is a prime.

It is not an unprimeable number, because it can be changed into a prime (25690045571791) by changing a digit.

It is a polite number, since it can be written in 95 ways as a sum of consecutive naturals, for example, 1765752955 + ... + 1765767503.

It is an arithmetic number, because the mean of its divisors is an integer number (410865955500).

Almost surely, 2^{25690045571721} is an apocalyptic number.

It is an amenable number.

25690045571721 is a deficient number, since it is larger than the sum of its proper divisors (13753086156279).

25690045571721 is a wasteful number, since it uses less digits than its factorization.

25690045571721 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 15621 (or 15609 counting only the distinct ones).

The product of its (nonzero) digits is 5292000, while the sum is 54.

The spelling of 25690045571721 in words is "twenty-five trillion, six hundred ninety billion, forty-five million, five hundred seventy-one thousand, seven hundred twenty-one".