25546906531 has 2 divisors, whose sum is σ = 25546906532. Its totient is φ = 25546906530.

The previous prime is 25546906499. The next prime is 25546906543. The reversal of 25546906531 is 13560964552.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 25546906531 - 2⁵ = 25546906499 is a prime.

It is a super-2 number, since 2×25546906531² (a number of 22 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (25546906631) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 12773453265 + 12773453266.

It is an arithmetic number, because the mean of its divisors is an integer number (12773453266).

Almost surely, 2^25546906531 is an apocalyptic number.

25546906531 is a deficient number, since it is larger than the sum of its proper divisors (1).

25546906531 is an equidigital number, since it uses as much as digits as its factorization.

25546906531 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 972000, while the sum is 46.

The spelling of 25546906531 in words is "twenty-five billion, five hundred forty-six million, nine hundred six thousand, five hundred thirty-one".