25620413531 has 2 divisors, whose sum is σ = 25620413532. Its totient is φ = 25620413530.

The previous prime is 25620413521. The next prime is 25620413557. The reversal of 25620413531 is 13531402652.

It is a happy number.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 25620413531 - 2¹⁴ = 25620397147 is a prime.

It is a super-2 number, since 2×25620413531² (a number of 22 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (25620413521) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 12810206765 + 12810206766.

It is an arithmetic number, because the mean of its divisors is an integer number (12810206766).

Almost surely, 2^25620413531 is an apocalyptic number.

25620413531 is a deficient number, since it is larger than the sum of its proper divisors (1).

25620413531 is an equidigital number, since it uses as much as digits as its factorization.

25620413531 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 21600, while the sum is 32.

The spelling of 25620413531 in words is "twenty-five billion, six hundred twenty million, four hundred thirteen thousand, five hundred thirty-one".