49977806491 has 2 divisors, whose sum is σ = 49977806492. Its totient is φ = 49977806490.

The previous prime is 49977806477. The next prime is 49977806497. The reversal of 49977806491 is 19460877994.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 49977806491 - 2³¹ = 47830322843 is a prime.

It is a super-2 number, since 2×49977806491² (a number of 22 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (49977806497) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 24988903245 + 24988903246.

It is an arithmetic number, because the mean of its divisors is an integer number (24988903246).

Almost surely, 2^49977806491 is an apocalyptic number.

49977806491 is a deficient number, since it is larger than the sum of its proper divisors (1).

49977806491 is an equidigital number, since it uses as much as digits as its factorization.

49977806491 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 27433728, while the sum is 64.

The spelling of 49977806491 in words is "forty-nine billion, nine hundred seventy-seven million, eight hundred six thousand, four hundred ninety-one".