27402889331 has 2 divisors, whose sum is σ = 27402889332. Its totient is φ = 27402889330.

The previous prime is 27402889321. The next prime is 27402889357. The reversal of 27402889331 is 13398820472.

It is a happy number.

It is a weak prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-27402889331 is a prime.

It is a super-2 number, since 2×27402889331² (a number of 22 digits) contains 22 as substring.

It is a Sophie Germain prime.

It is not a weakly prime, because it can be changed into another prime (27402889321) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 13701444665 + 13701444666.

It is an arithmetic number, because the mean of its divisors is an integer number (13701444666).

Almost surely, 2^27402889331 is an apocalyptic number.

27402889331 is a deficient number, since it is larger than the sum of its proper divisors (1).

27402889331 is an equidigital number, since it uses as much as digits as its factorization.

27402889331 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 580608, while the sum is 47.

The spelling of 27402889331 in words is "twenty-seven billion, four hundred two million, eight hundred eighty-nine thousand, three hundred thirty-one".