979686800640 has 144 divisors (see below), whose sum is σ = 3476527588800. Its totient is φ = 261249804288.

The previous prime is 979686800639. The next prime is 979686800641. The reversal of 979686800640 is 46008686979.

It is an interprime number because it is at equal distance from previous prime (979686800639) and next prime (979686800641).

It is a tau number, because it is divible by the number of its divisors (144).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (979686800641) 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, 14139150 + ... + 14208269.

It is an arithmetic number, because the mean of its divisors is an integer number (24142552700).

Almost surely, 2^979686800640 is an apocalyptic number.

979686800640 is a gapful number since it is divisible by the number (90) formed by its first and last digit.

It is an amenable number.

979686800640 is an abundant number, since it is smaller than the sum of its proper divisors (2496840788160).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

979686800640 is a wasteful number, since it uses less digits than its factorization.

979686800640 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 28347449 (or 28347429 counting only the distinct ones).

The product of its (nonzero) digits is 31352832, while the sum is 63.

The spelling of 979686800640 in words is "nine hundred seventy-nine billion, six hundred eighty-six million, eight hundred thousand, six hundred forty".