878555659972 has 12 divisors (see below), whose sum is σ = 1537479811756. Its totient is φ = 439275713760.

The previous prime is 878555659967. The next prime is 878555659973. The reversal of 878555659972 is 279956555878.

It can be written as a sum of positive squares in 2 ways, for example, as 361027932736 + 517527727236 = 600856^2 + 719394^2 .

It is not an unprimeable number, because it can be changed into a prime (878555659973) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 747022 + ... + 1521562.

Almost surely, 2^878555659972 is an apocalyptic number.

It is an amenable number.

878555659972 is a deficient number, since it is larger than the sum of its proper divisors (658924151784).

878555659972 is a wasteful number, since it uses less digits than its factorization.

878555659972 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1058118 (or 1058116 counting only the distinct ones).

The product of its digits is 1905120000, while the sum is 76.

The spelling of 878555659972 in words is "eight hundred seventy-eight billion, five hundred fifty-five million, six hundred fifty-nine thousand, nine hundred seventy-two".