78687742980 has 96 divisors (see below), whose sum is σ = 274691773440. Its totient is φ = 16350698880.

The previous prime is 78687742967. The next prime is 78687742993. The reversal of 78687742980 is 8924778687.

It is an interprime number because it is at equal distance from previous prime (78687742967) and next prime (78687742993).

It is a Harshad number since it is a multiple of its sum of digits (66).

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 8511370 + ... + 8520609.

It is an arithmetic number, because the mean of its divisors is an integer number (2861372640).

Almost surely, 2^78687742980 is an apocalyptic number.

78687742980 is a gapful number since it is divisible by the number (70) formed by its first and last digit.

It is an amenable number.

78687742980 is an abundant number, since it is smaller than the sum of its proper divisors (196004030460).

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

78687742980 is a wasteful number, since it uses less digits than its factorization.

78687742980 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 17032009 (or 17032007 counting only the distinct ones).

The product of its (nonzero) digits is 75866112, while the sum is 66.

The spelling of 78687742980 in words is "seventy-eight billion, six hundred eighty-seven million, seven hundred forty-two thousand, nine hundred eighty".