25044961531 has 2 divisors, whose sum is σ = 25044961532. Its totient is φ = 25044961530.

The previous prime is 25044961517. The next prime is 25044961577. The reversal of 25044961531 is 13516944052.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 25044961531 - 2⁵ = 25044961499 is a prime.

It is a super-2 number, since 2×25044961531² (a number of 22 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (25044961231) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 12522480765 + 12522480766.

It is an arithmetic number, because the mean of its divisors is an integer number (12522480766).

Almost surely, 2^25044961531 is an apocalyptic number.

25044961531 is a deficient number, since it is larger than the sum of its proper divisors (1).

25044961531 is an equidigital number, since it uses as much as digits as its factorization.

25044961531 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 129600, while the sum is 40.

The spelling of 25044961531 in words is "twenty-five billion, forty-four million, nine hundred sixty-one thousand, five hundred thirty-one".