49775721577 has 2 divisors, whose sum is σ = 49775721578. Its totient is φ = 49775721576.

The previous prime is 49775721559. The next prime is 49775721617. The reversal of 49775721577 is 77512757794.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 35249687001 + 14526034576 = 187749^2 + 120524^2 .

It is a cyclic number.

It is not a de Polignac number, because 49775721577 - 2⁷ = 49775721449 is a prime.

It is a super-2 number, since 2×49775721577² (a number of 22 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (49775721077) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 24887860788 + 24887860789.

It is an arithmetic number, because the mean of its divisors is an integer number (24887860789).

Almost surely, 2^49775721577 is an apocalyptic number.

It is an amenable number.

49775721577 is a deficient number, since it is larger than the sum of its proper divisors (1).

49775721577 is an equidigital number, since it uses as much as digits as its factorization.

49775721577 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 30252600, while the sum is 61.

The spelling of 49775721577 in words is "forty-nine billion, seven hundred seventy-five million, seven hundred twenty-one thousand, five hundred seventy-seven".