978446674738 has 32 divisors (see below), whose sum is σ = 1603872410112. Its totient is φ = 444945052800.

The previous prime is 978446674727. The next prime is 978446674741. The reversal of 978446674738 is 837476644879.

It is a Harshad number since it is a multiple of its sum of digits (73).

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, 1577503 + ... + 2108413.

It is an arithmetic number, because the mean of its divisors is an integer number (50121012816).

Almost surely, 2^978446674738 is an apocalyptic number.

978446674738 is a deficient number, since it is larger than the sum of its proper divisors (625425735374).

978446674738 is a wasteful number, since it uses less digits than its factorization.

978446674738 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 531970.

The product of its digits is 1365590016, while the sum is 73.

The spelling of 978446674738 in words is "nine hundred seventy-eight billion, four hundred forty-six million, six hundred seventy-four thousand, seven hundred thirty-eight".