61102605520 has 80 divisors (see below), whose sum is σ = 155022131520. Its totient is φ = 22212864000.

The previous prime is 61102605511. The next prime is 61102605569. The reversal of 61102605520 is 2550620116.

It is a tau number, because it is divible by the number of its divisors (80).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 4085416 + ... + 4100344.

It is an arithmetic number, because the mean of its divisors is an integer number (1937776644).

Almost surely, 2^61102605520 is an apocalyptic number.

It is an amenable number.

61102605520 is an abundant number, since it is smaller than the sum of its proper divisors (93919526000).

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

61102605520 is a wasteful number, since it uses less digits than its factorization.

61102605520 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 19604 (or 19598 counting only the distinct ones).

The product of its (nonzero) digits is 3600, while the sum is 28.

The spelling of 61102605520 in words is "sixty-one billion, one hundred two million, six hundred five thousand, five hundred twenty".