61610551665560 has 32 divisors (see below), whose sum is σ = 138628605587040. Its totient is φ = 24643355894784.

The previous prime is 61610551665547. The next prime is 61610551665653. The reversal of 61610551665560 is 6556615501616.

It is a super-2 number, since 2×61610551665560² (a number of 28 digits) contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 25869332 + ... + 28150371.

It is an arithmetic number, because the mean of its divisors is an integer number (4332143924595).

Almost surely, 2^{61610551665560} is an apocalyptic number.

It is an amenable number.

61610551665560 is an abundant number, since it is smaller than the sum of its proper divisors (77018053921480).

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

61610551665560 is a wasteful number, since it uses less digits than its factorization.

61610551665560 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 54048227 (or 54048223 counting only the distinct ones).

The product of its (nonzero) digits is 4860000, while the sum is 53.

The spelling of 61610551665560 in words is "sixty-one trillion, six hundred ten billion, five hundred fifty-one million, six hundred sixty-five thousand, five hundred sixty".