49915992691 has 2 divisors, whose sum is σ = 49915992692. Its totient is φ = 49915992690.

The previous prime is 49915992661. The next prime is 49915992809. The reversal of 49915992691 is 19629951994.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 49915992691 - 2⁹ = 49915992179 is a prime.

It is not a weakly prime, because it can be changed into another prime (49915992601) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 24957996345 + 24957996346.

It is an arithmetic number, because the mean of its divisors is an integer number (24957996346).

Almost surely, 2^49915992691 is an apocalyptic number.

49915992691 is a deficient number, since it is larger than the sum of its proper divisors (1).

49915992691 is an equidigital number, since it uses as much as digits as its factorization.

49915992691 is an evil number, because the sum of its binary digits is even.

The product of its digits is 14171760, while the sum is 64.

The spelling of 49915992691 in words is "forty-nine billion, nine hundred fifteen million, nine hundred ninety-two thousand, six hundred ninety-one".