102108739842 has 12 divisors (see below), whose sum is σ = 221235603030. Its totient is φ = 34036246608.

The previous prime is 102108739807. The next prime is 102108739849. The reversal of 102108739842 is 248937801201.

It is a happy number.

102108739842 is a `hidden beast` number, since 1 + 0 + 210 + 8 + 7 + 398 + 42 = 666.

It can be written as a sum of positive squares in only one way, i.e., 88749772281 + 13358967561 = 297909^2 + 115581^2 .

It is not an unprimeable number, because it can be changed into a prime (102108739849) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 2836353867 + ... + 2836353902.

Almost surely, 2^102108739842 is an apocalyptic number.

102108739842 is an abundant number, since it is smaller than the sum of its proper divisors (119126863188).

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

102108739842 is a wasteful number, since it uses less digits than its factorization.

102108739842 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5672707777 (or 5672707774 counting only the distinct ones).

The product of its (nonzero) digits is 193536, while the sum is 45.

The spelling of 102108739842 in words is "one hundred two billion, one hundred eight million, seven hundred thirty-nine thousand, eight hundred forty-two".