877784477445 has 12 divisors (see below), whose sum is σ = 1521493094316. Its totient is φ = 468151721280.

The previous prime is 877784477411. The next prime is 877784477461. The reversal of 877784477445 is 544774487778.

877784477445 is a `hidden beast` number, since 8 + 7 + 7 + 78 + 44 + 77 + 445 = 666.

It can be written as a sum of positive squares in 2 ways, for example, as 653977898721 + 223806578724 = 808689^2 + 473082^2 .

It is not a de Polignac number, because 877784477445 - 2²² = 877780283141 is a prime.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 9753160816 + ... + 9753160905.

It is an arithmetic number, because the mean of its divisors is an integer number (126791091193).

Almost surely, 2^877784477445 is an apocalyptic number.

It is an amenable number.

877784477445 is a deficient number, since it is larger than the sum of its proper divisors (643708616871).

877784477445 is a wasteful number, since it uses less digits than its factorization.

877784477445 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 19506321732 (or 19506321729 counting only the distinct ones).

The product of its digits is 1376829440, while the sum is 72.

The spelling of 877784477445 in words is "eight hundred seventy-seven billion, seven hundred eighty-four million, four hundred seventy-seven thousand, four hundred forty-five".