877993392557 has 2 divisors, whose sum is σ = 877993392558. Its totient is φ = 877993392556.

The previous prime is 877993392541. The next prime is 877993392571. The reversal of 877993392557 is 755293399778.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 669821117476 + 208172275081 = 818426^2 + 456259^2 .

It is a cyclic number.

It is not a de Polignac number, because 877993392557 - 2⁴ = 877993392541 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (877993395557) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 438996696278 + 438996696279.

It is an arithmetic number, because the mean of its divisors is an integer number (438996696279).

Almost surely, 2^877993392557 is an apocalyptic number.

It is an amenable number.

877993392557 is a deficient number, since it is larger than the sum of its proper divisors (1).

877993392557 is an equidigital number, since it uses as much as digits as its factorization.

877993392557 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 900169200, while the sum is 74.

The spelling of 877993392557 in words is "eight hundred seventy-seven billion, nine hundred ninety-three million, three hundred ninety-two thousand, five hundred fifty-seven".