78360967920 has 80 divisors (see below), whose sum is σ = 248843885472. Its totient is φ = 20386590720.

The previous prime is 78360967903. The next prime is 78360967981. The reversal of 78360967920 is 2976906387.

It is a happy number.

It is a tau number, because it is divible by the number of its divisors (80).

It is a super-2 number, since 2×78360967920² (a number of 23 digits) contains 22 as substring.

It is a congruent number.

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, 3971917 + ... + 3991596.

Almost surely, 2^78360967920 is an apocalyptic number.

It is an amenable number.

78360967920 is an abundant number, since it is smaller than the sum of its proper divisors (170482917552).

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

78360967920 is a wasteful number, since it uses less digits than its factorization.

78360967920 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7963570 (or 7963564 counting only the distinct ones).

The product of its (nonzero) digits is 6858432, while the sum is 57.

The spelling of 78360967920 in words is "seventy-eight billion, three hundred sixty million, nine hundred sixty-seven thousand, nine hundred twenty".