102155521556 has 12 divisors (see below), whose sum is σ = 195024177600. Its totient is φ = 46434327960.

The previous prime is 102155521549. The next prime is 102155521609. The reversal of 102155521556 is 655125551201.

102155521556 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It is a super-2 number, since 2×102155521556² (a number of 23 digits) contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1160858156 + ... + 1160858243.

It is an arithmetic number, because the mean of its divisors is an integer number (16252014800).

Almost surely, 2^102155521556 is an apocalyptic number.

It is an amenable number.

102155521556 is a deficient number, since it is larger than the sum of its proper divisors (92868656044).

102155521556 is a wasteful number, since it uses less digits than its factorization.

102155521556 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2321716414 (or 2321716412 counting only the distinct ones).

The product of its (nonzero) digits is 75000, while the sum is 38.

The spelling of 102155521556 in words is "one hundred two billion, one hundred fifty-five million, five hundred twenty-one thousand, five hundred fifty-six".