978894069874 has 32 divisors (see below), whose sum is σ = 1702159353216. Its totient is φ = 413546688000.

The previous prime is 978894069869. The next prime is 978894069919. The reversal of 978894069874 is 478960498879.

It is a junction number, because it is equal to n+sod(n) for n = 978894069794 and 978894069803.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1095069 + ... + 1776784.

It is an arithmetic number, because the mean of its divisors is an integer number (53192479788).

Almost surely, 2^978894069874 is an apocalyptic number.

978894069874 is a deficient number, since it is larger than the sum of its proper divisors (723265283342).

978894069874 is a wasteful number, since it uses less digits than its factorization.

978894069874 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2872210.

The product of its (nonzero) digits is 1755758592, while the sum is 79.

The spelling of 978894069874 in words is "nine hundred seventy-eight billion, eight hundred ninety-four million, sixty-nine thousand, eight hundred seventy-four".