102979978920 has 192 divisors, whose sum is σ = 411920046720. Its totient is φ = 21727636992.

The previous prime is 102979978919. The next prime is 102979978921. The reversal of 102979978920 is 29879979201.

It is an interprime number because it is at equal distance from previous prime (102979978919) and next prime (102979978921).

It is a Harshad number since it is a multiple of its sum of digits (63).

It is not an unprimeable number, because it can be changed into a prime (102979978921) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 1538974 + ... + 1604493.

It is an arithmetic number, because the mean of its divisors is an integer number (2145416910).

Almost surely, 2^102979978920 is an apocalyptic number.

102979978920 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

102979978920 is an abundant number, since it is smaller than the sum of its proper divisors (308940067800).

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

102979978920 is a wasteful number, since it uses less digits than its factorization.

102979978920 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3143504 (or 3143497 counting only the distinct ones).

The product of its (nonzero) digits is 10287648, while the sum is 63.

The spelling of 102979978920 in words is "one hundred two billion, nine hundred seventy-nine million, nine hundred seventy-eight thousand, nine hundred twenty".