72157140877 has 2 divisors, whose sum is σ = 72157140878. Its totient is φ = 72157140876.

The previous prime is 72157140871. The next prime is 72157140941. The reversal of 72157140877 is 77804175127.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 72140050921 + 17089956 = 268589^2 + 4134^2 .

It is a cyclic number.

It is not a de Polignac number, because 72157140877 - 2⁷ = 72157140749 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 72157140877.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (72157140871) 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, 36078570438 + 36078570439.

It is an arithmetic number, because the mean of its divisors is an integer number (36078570439).

Almost surely, 2^72157140877 is an apocalyptic number.

It is an amenable number.

72157140877 is a deficient number, since it is larger than the sum of its proper divisors (1).

72157140877 is an equidigital number, since it uses as much as digits as its factorization.

72157140877 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 768320, while the sum is 49.

The spelling of 72157140877 in words is "seventy-two billion, one hundred fifty-seven million, one hundred forty thousand, eight hundred seventy-seven".