78964748640 has 120 divisors (see below), whose sum is σ = 278679804480. Its totient is φ = 21057262848.

The previous prime is 78964748633. The next prime is 78964748641. The reversal of 78964748640 is 4684746987.

78964748640 is a `hidden beast` number, since 7 + 89 + 6 + 474 + 86 + 4 + 0 = 666.

It is a tau number, because it is divible by the number of its divisors (120).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (78964748641) by changing a digit.

It is a polite number, since it can be written in 19 ways as a sum of consecutive naturals, for example, 3033520 + ... + 3059439.

It is an arithmetic number, because the mean of its divisors is an integer number (2322331704).

Almost surely, 2^78964748640 is an apocalyptic number.

It is an amenable number.

78964748640 is an abundant number, since it is smaller than the sum of its proper divisors (199715055840).

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

78964748640 is a wasteful number, since it uses less digits than its factorization.

78964748640 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6092986 (or 6092969 counting only the distinct ones).

The product of its (nonzero) digits is 65028096, while the sum is 63.

The spelling of 78964748640 in words is "seventy-eight billion, nine hundred sixty-four million, seven hundred forty-eight thousand, six hundred forty".