117571437491 has 2 divisors, whose sum is σ = 117571437492. Its totient is φ = 117571437490.

The previous prime is 117571437479. The next prime is 117571437593. The reversal of 117571437491 is 194734175711.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 117571437491 - 2⁶ = 117571437427 is a prime.

It is not a weakly prime, because it can be changed into another prime (117571437461) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 58785718745 + 58785718746.

It is an arithmetic number, because the mean of its divisors is an integer number (58785718746).

Almost surely, 2^117571437491 is an apocalyptic number.

117571437491 is a deficient number, since it is larger than the sum of its proper divisors (1).

117571437491 is an equidigital number, since it uses as much as digits as its factorization.

117571437491 is an evil number, because the sum of its binary digits is even.

The product of its digits is 740880, while the sum is 50.

The spelling of 117571437491 in words is "one hundred seventeen billion, five hundred seventy-one million, four hundred thirty-seven thousand, four hundred ninety-one".