978159691041 has 16 divisors (see below), whose sum is σ = 1404577109376. Its totient is φ = 601927232256.

The previous prime is 978159691027. The next prime is 978159691073. The reversal of 978159691041 is 140196951879.

It is not a de Polignac number, because 978159691041 - 2⁷ = 978159690913 is a prime.

It is not an unprimeable number, because it can be changed into a prime (978159691021) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1099876 + ... + 1779338.

It is an arithmetic number, because the mean of its divisors is an integer number (87786069336).

Almost surely, 2^978159691041 is an apocalyptic number.

It is an amenable number.

978159691041 is a deficient number, since it is larger than the sum of its proper divisors (426417418335).

978159691041 is a wasteful number, since it uses less digits than its factorization.

978159691041 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 716392.

The product of its (nonzero) digits is 4898880, while the sum is 60.

The spelling of 978159691041 in words is "nine hundred seventy-eight billion, one hundred fifty-nine million, six hundred ninety-one thousand, forty-one".