25465252251643 has 24 divisors (see below), whose sum is σ = 27909167569920. Its totient is φ = 23206948184880.

The previous prime is 25465252251631. The next prime is 25465252251671. The reversal of 25465252251643 is 34615225256452.

It is a happy number.

It is a de Polignac number, because none of the positive numbers 2^k-25465252251643 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (25465252255643) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 4944013 + ... + 8681806.

It is an arithmetic number, because the mean of its divisors is an integer number (1162881982080).

Almost surely, 2^{25465252251643} is an apocalyptic number.

25465252251643 is a deficient number, since it is larger than the sum of its proper divisors (2443915318277).

25465252251643 is a wasteful number, since it uses less digits than its factorization.

25465252251643 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 13626055 (or 13626036 counting only the distinct ones).

The product of its digits is 17280000, while the sum is 52.

The spelling of 25465252251643 in words is "twenty-five trillion, four hundred sixty-five billion, two hundred fifty-two million, two hundred fifty-one thousand, six hundred forty-three".