102399999156 has 72 divisors (see below), whose sum is σ = 318577785344. Its totient is φ = 27006592320.

The previous prime is 102399999151. The next prime is 102399999157. The reversal of 102399999156 is 651999993201.

102399999156 is a `hidden beast` number, since 1 + 0 + 2 + 399 + 9 + 99 + 156 = 666.

102399999156 is digitally balanced in base 3 and base 7, because in such bases it contains all the possibile digits an equal number of times.

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

It is a junction number, because it is equal to n+sod(n) for n = 102399999093 and 102399999102.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (102399999151) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 15625540 + ... + 15632091.

Almost surely, 2^102399999156 is an apocalyptic number.

It is an amenable number.

102399999156 is an abundant number, since it is smaller than the sum of its proper divisors (216177786188).

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

102399999156 is a wasteful number, since it uses less digits than its factorization.

102399999156 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 31257661 (or 31257656 counting only the distinct ones).

The product of its (nonzero) digits is 10628820, while the sum is 63.

The spelling of 102399999156 in words is "one hundred two billion, three hundred ninety-nine million, nine hundred ninety-nine thousand, one hundred fifty-six".