102561055644 has 48 divisors (see below), whose sum is σ = 241691788800. Its totient is φ = 33847125696.

The previous prime is 102561055637. The next prime is 102561055691. The reversal of 102561055644 is 446550165201.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1695529 + ... + 1754975.

It is an arithmetic number, because the mean of its divisors is an integer number (5035245600).

Almost surely, 2^102561055644 is an apocalyptic number.

It is an amenable number.

102561055644 is an abundant number, since it is smaller than the sum of its proper divisors (139130733156).

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

102561055644 is a wasteful number, since it uses less digits than its factorization.

102561055644 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 60882 (or 60880 counting only the distinct ones).

The product of its (nonzero) digits is 144000, while the sum is 39.

The spelling of 102561055644 in words is "one hundred two billion, five hundred sixty-one million, fifty-five thousand, six hundred forty-four".