102542439620 has 24 divisors (see below), whose sum is σ = 224701694784. Its totient is φ = 39233628896.

The previous prime is 102542439617. The next prime is 102542439631. The reversal of 102542439620 is 26934245201.

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, 111458714 + ... + 111459633.

It is an arithmetic number, because the mean of its divisors is an integer number (9362570616).

Almost surely, 2^102542439620 is an apocalyptic number.

102542439620 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

102542439620 is an abundant number, since it is smaller than the sum of its proper divisors (122159255164).

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

102542439620 is a wasteful number, since it uses less digits than its factorization.

102542439620 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 222918379 (or 222918377 counting only the distinct ones).

The product of its (nonzero) digits is 103680, while the sum is 38.

The spelling of 102542439620 in words is "one hundred two billion, five hundred forty-two million, four hundred thirty-nine thousand, six hundred twenty".