878737601391 has 64 divisors (see below), whose sum is σ = 1281387993984. Its totient is φ = 532426752000.

The previous prime is 878737601381. The next prime is 878737601393. The reversal of 878737601391 is 193106737878.

It is not a de Polignac number, because 878737601391 - 2⁹ = 878737600879 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (878737601393) by changing a digit.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 724432701 + ... + 724433913.

It is an arithmetic number, because the mean of its divisors is an integer number (20021687406).

Almost surely, 2^878737601391 is an apocalyptic number.

878737601391 is a deficient number, since it is larger than the sum of its proper divisors (402650392593).

878737601391 is a wasteful number, since it uses less digits than its factorization.

878737601391 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2204.

The product of its (nonzero) digits is 10668672, while the sum is 60.

The spelling of 878737601391 in words is "eight hundred seventy-eight billion, seven hundred thirty-seven million, six hundred one thousand, three hundred ninety-one".