77968158720 has 104 divisors (see below), whose sum is σ = 249467848176. Its totient is φ = 20791492608.

The previous prime is 77968158701. The next prime is 77968158731. The reversal of 77968158720 is 2785186977.

It is a super-2 number, since 2×77968158720² (a number of 23 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (60).

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 573067 + ... + 695946.

Almost surely, 2^77968158720 is an apocalyptic number.

It is an amenable number.

77968158720 is an abundant number, since it is smaller than the sum of its proper divisors (171499689456).

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

77968158720 is a wasteful number, since it uses less digits than its factorization.

77968158720 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1269045 (or 1269023 counting only the distinct ones).

The product of its (nonzero) digits is 11854080, while the sum is 60.

The spelling of 77968158720 in words is "seventy-seven billion, nine hundred sixty-eight million, one hundred fifty-eight thousand, seven hundred twenty".