371722565491 has 2 divisors, whose sum is σ = 371722565492. Its totient is φ = 371722565490.

The previous prime is 371722565453. The next prime is 371722565527. The reversal of 371722565491 is 194565227173.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-371722565491 is a prime.

It is not a weakly prime, because it can be changed into another prime (371722565191) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 185861282745 + 185861282746.

It is an arithmetic number, because the mean of its divisors is an integer number (185861282746).

Almost surely, 2^371722565491 is an apocalyptic number.

371722565491 is a deficient number, since it is larger than the sum of its proper divisors (1).

371722565491 is an equidigital number, since it uses as much as digits as its factorization.

371722565491 is an evil number, because the sum of its binary digits is even.

The product of its digits is 3175200, while the sum is 52.

The spelling of 371722565491 in words is "three hundred seventy-one billion, seven hundred twenty-two million, five hundred sixty-five thousand, four hundred ninety-one".