61102620655 has 16 divisors (see below), whose sum is σ = 75082075200. Its totient is φ = 47718747648.

The previous prime is 61102620643. The next prime is 61102620707. The reversal of 61102620655 is 55602620116.

It is a cyclic number.

It is not a de Polignac number, because 61102620655 - 2¹¹ = 61102618607 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 61102620655.

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, 526602 + ... + 632071.

It is an arithmetic number, because the mean of its divisors is an integer number (4692629700).

Almost surely, 2^61102620655 is an apocalyptic number.

61102620655 is a deficient number, since it is larger than the sum of its proper divisors (13979454545).

61102620655 is a wasteful number, since it uses less digits than its factorization.

61102620655 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1158930.

The product of its (nonzero) digits is 21600, while the sum is 34.

The spelling of 61102620655 in words is "sixty-one billion, one hundred two million, six hundred twenty thousand, six hundred fifty-five".