916437543491 has 2 divisors, whose sum is σ = 916437543492. Its totient is φ = 916437543490.

The previous prime is 916437543457. The next prime is 916437543503. The reversal of 916437543491 is 194345734619.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 916437543491 - 2²⁶ = 916370434627 is a prime.

It is a super-2 number, since 2×916437543491² (a number of 25 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (916437543191) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 458218771745 + 458218771746.

It is an arithmetic number, because the mean of its divisors is an integer number (458218771746).

Almost surely, 2^916437543491 is an apocalyptic number.

916437543491 is a deficient number, since it is larger than the sum of its proper divisors (1).

916437543491 is an equidigital number, since it uses as much as digits as its factorization.

916437543491 is an evil number, because the sum of its binary digits is even.

The product of its digits is 9797760, while the sum is 56.

The spelling of 916437543491 in words is "nine hundred sixteen billion, four hundred thirty-seven million, five hundred forty-three thousand, four hundred ninety-one".