26387830531 has 2 divisors, whose sum is σ = 26387830532. Its totient is φ = 26387830530.

The previous prime is 26387830523. The next prime is 26387830561. The reversal of 26387830531 is 13503878362.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 26387830531 - 2³ = 26387830523 is a prime.

It is a super-2 number, since 2×26387830531² (a number of 22 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (26387830501) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 13193915265 + 13193915266.

It is an arithmetic number, because the mean of its divisors is an integer number (13193915266).

Almost surely, 2^26387830531 is an apocalyptic number.

26387830531 is a deficient number, since it is larger than the sum of its proper divisors (1).

26387830531 is an equidigital number, since it uses as much as digits as its factorization.

26387830531 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 725760, while the sum is 46.

The spelling of 26387830531 in words is "twenty-six billion, three hundred eighty-seven million, eight hundred thirty thousand, five hundred thirty-one".