25476665531 has 2 divisors, whose sum is σ = 25476665532. Its totient is φ = 25476665530.

The previous prime is 25476665509. The next prime is 25476665549. The reversal of 25476665531 is 13556667452.

It is a happy number.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-25476665531 is a prime.

It is a super-2 number, since 2×25476665531² (a number of 22 digits) contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 25476665531.

It is not a weakly prime, because it can be changed into another prime (25476665581) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 12738332765 + 12738332766.

It is an arithmetic number, because the mean of its divisors is an integer number (12738332766).

Almost surely, 2^25476665531 is an apocalyptic number.

25476665531 is a deficient number, since it is larger than the sum of its proper divisors (1).

25476665531 is an equidigital number, since it uses as much as digits as its factorization.

25476665531 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 4536000, while the sum is 50.

The spelling of 25476665531 in words is "twenty-five billion, four hundred seventy-six million, six hundred sixty-five thousand, five hundred thirty-one".