102155644361620 has 12 divisors (see below), whose sum is σ = 214526853159444. Its totient is φ = 40862257744640.

The previous prime is 102155644361581. The next prime is 102155644361623. The reversal of 102155644361620 is 26163446551201.

It can be written as a sum of positive squares in 2 ways, for example, as 46136317386384 + 56019326975236 = 6792372^2 + 7484606^2 .

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (102155644361623) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2553891109021 + ... + 2553891109060.

It is an arithmetic number, because the mean of its divisors is an integer number (17877237763287).

Almost surely, 2^{102155644361620} is an apocalyptic number.

102155644361620 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

102155644361620 is an abundant number, since it is smaller than the sum of its proper divisors (112371208797824).

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

102155644361620 is a wasteful number, since it uses less digits than its factorization.

102155644361620 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5107782218090 (or 5107782218088 counting only the distinct ones).

The product of its (nonzero) digits is 1036800, while the sum is 46.

The spelling of 102155644361620 in words is "one hundred two trillion, one hundred fifty-five billion, six hundred forty-four million, three hundred sixty-one thousand, six hundred twenty".