102173132646 has 64 divisors (see below), whose sum is σ = 244795299840. Its totient is φ = 31402092960.

The previous prime is 102173132639. The next prime is 102173132657. The reversal of 102173132646 is 646231371201.

102173132646 is a `hidden beast` number, since 1 + 0 + 2 + 1 + 7 + 3 + 1 + 3 + 2 + 646 = 666.

It is a super-2 number, since 2×102173132646² (a number of 23 digits) contains 22 as substring.

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 102173132646.

It is a congruent number.

It is an unprimeable number.

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 31 ways as a sum of consecutive naturals, for example, 537451 + ... + 702281.

It is an arithmetic number, because the mean of its divisors is an integer number (3824926560).

Almost surely, 2^102173132646 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 102173132646, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (122397649920).

102173132646 is an abundant number, since it is smaller than the sum of its proper divisors (142622167194).

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

102173132646 is a wasteful number, since it uses less digits than its factorization.

102173132646 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 165738 (or 165732 counting only the distinct ones).

The product of its (nonzero) digits is 36288, while the sum is 36.

The spelling of 102173132646 in words is "one hundred two billion, one hundred seventy-three million, one hundred thirty-two thousand, six hundred forty-six".