25457620771 has 16 divisors (see below), whose sum is σ = 29067072768. Its totient is φ = 22070109600.

The previous prime is 25457620753. The next prime is 25457620823. The reversal of 25457620771 is 17702675452.

It is not a de Polignac number, because 25457620771 - 2⁹ = 25457620259 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (25457620271) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 68256 + ... + 235741.

It is an arithmetic number, because the mean of its divisors is an integer number (1816692048).

Almost surely, 2^25457620771 is an apocalyptic number.

25457620771 is a deficient number, since it is larger than the sum of its proper divisors (3609451997).

25457620771 is a wasteful number, since it uses less digits than its factorization.

25457620771 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 304362.

The product of its (nonzero) digits is 823200, while the sum is 46.

The spelling of 25457620771 in words is "twenty-five billion, four hundred fifty-seven million, six hundred twenty thousand, seven hundred seventy-one".