979505699678 has 32 divisors (see below), whose sum is σ = 1786433149440. Its totient is φ = 396985138560.

The previous prime is 979505699671. The next prime is 979505699687. The reversal of 979505699678 is 876996505979.

It is a happy number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (979505699671) 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, 68913926 + ... + 68928137.

It is an arithmetic number, because the mean of its divisors is an integer number (55826035920).

Almost surely, 2^979505699678 is an apocalyptic number.

979505699678 is a deficient number, since it is larger than the sum of its proper divisors (806927449762).

979505699678 is a wasteful number, since it uses less digits than its factorization.

979505699678 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 137842112.

The product of its (nonzero) digits is 2314720800, while the sum is 80.

The spelling of 979505699678 in words is "nine hundred seventy-nine billion, five hundred five million, six hundred ninety-nine thousand, six hundred seventy-eight".