45197717491 has 2 divisors, whose sum is σ = 45197717492. Its totient is φ = 45197717490.

The previous prime is 45197717489. The next prime is 45197717563. The reversal of 45197717491 is 19471779154.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 45197717491 - 2¹ = 45197717489 is a prime.

Together with 45197717489, it forms a pair of twin primes.

It is not a weakly prime, because it can be changed into another prime (45197717441) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 22598858745 + 22598858746.

It is an arithmetic number, because the mean of its divisors is an integer number (22598858746).

Almost surely, 2^45197717491 is an apocalyptic number.

45197717491 is a deficient number, since it is larger than the sum of its proper divisors (1).

45197717491 is an equidigital number, since it uses as much as digits as its factorization.

45197717491 is an evil number, because the sum of its binary digits is even.

The product of its digits is 2222640, while the sum is 55.

The spelling of 45197717491 in words is "forty-five billion, one hundred ninety-seven million, seven hundred seventeen thousand, four hundred ninety-one".