61655555150 has 48 divisors (see below), whose sum is σ = 131128574496. Its totient is φ = 21128325120.

The previous prime is 61655555149. The next prime is 61655555167. The reversal of 61655555150 is 5155555616.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 662282 + ... + 749618.

It is an arithmetic number, because the mean of its divisors is an integer number (2731845302).

Almost surely, 2^61655555150 is an apocalyptic number.

61655555150 is an abundant number, since it is smaller than the sum of its proper divisors (69473019346).

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

61655555150 is a wasteful number, since it uses less digits than its factorization.

61655555150 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 89373 (or 89368 counting only the distinct ones).

The product of its (nonzero) digits is 562500, while the sum is 44.

The spelling of 61655555150 in words is "sixty-one billion, six hundred fifty-five million, five hundred fifty-five thousand, one hundred fifty".