72877555577791 has 2 divisors, whose sum is σ = 72877555577792. Its totient is φ = 72877555577790.

The previous prime is 72877555577759. The next prime is 72877555577831. The reversal of 72877555577791 is 19777555577827.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 72877555577791 - 2⁵ = 72877555577759 is a prime.

It is a super-2 number, since 2×72877555577791² (a number of 29 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (72877555571791) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 36438777788895 + 36438777788896.

It is an arithmetic number, because the mean of its divisors is an integer number (36438777788896).

Almost surely, 2^{72877555577791} is an apocalyptic number.

72877555577791 is a deficient number, since it is larger than the sum of its proper divisors (1).

72877555577791 is an equidigital number, since it uses as much as digits as its factorization.

72877555577791 is an evil number, because the sum of its binary digits is even.

The product of its digits is 10588410000, while the sum is 82.

The spelling of 72877555577791 in words is "seventy-two trillion, eight hundred seventy-seven billion, five hundred fifty-five million, five hundred seventy-seven thousand, seven hundred ninety-one".