49977806477 has 2 divisors, whose sum is σ = 49977806478. Its totient is φ = 49977806476.

The previous prime is 49977806413. The next prime is 49977806491. The reversal of 49977806477 is 77460877994.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 28689245641 + 21288560836 = 169379^2 + 145906^2 .

It is a cyclic number.

It is not a de Polignac number, because 49977806477 - 2⁶ = 49977806413 is a prime.

It is a super-2 number, since 2×49977806477² (a number of 22 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (49977806407) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 24988903238 + 24988903239.

It is an arithmetic number, because the mean of its divisors is an integer number (24988903239).

Almost surely, 2^49977806477 is an apocalyptic number.

It is an amenable number.

49977806477 is a deficient number, since it is larger than the sum of its proper divisors (1).

49977806477 is an equidigital number, since it uses as much as digits as its factorization.

49977806477 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 149361408, while the sum is 68.

The spelling of 49977806477 in words is "forty-nine billion, nine hundred seventy-seven million, eight hundred six thousand, four hundred seventy-seven".