877845997465 has 4 divisors (see below), whose sum is σ = 1053415196964. Its totient is φ = 702276797968.

The previous prime is 877845997459. The next prime is 877845997493. The reversal of 877845997465 is 564799548778.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 413136561049 + 464709436416 = 642757^2 + 681696^2 .

It is a cyclic number.

It is not a de Polignac number, because 877845997465 - 2²⁵ = 877812443033 is a prime.

It is a super-2 number, since 2×877845997465² (a number of 25 digits) contains 22 as substring.

It is a Duffinian number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 87784599742 + ... + 87784599751.

It is an arithmetic number, because the mean of its divisors is an integer number (263353799241).

Almost surely, 2^877845997465 is an apocalyptic number.

It is an amenable number.

877845997465 is a deficient number, since it is larger than the sum of its proper divisors (175569199499).

877845997465 is a wasteful number, since it uses less digits than its factorization.

877845997465 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 175569199498.

The product of its digits is 4267468800, while the sum is 79.

The spelling of 877845997465 in words is "eight hundred seventy-seven billion, eight hundred forty-five million, nine hundred ninety-seven thousand, four hundred sixty-five".