61155065616 has 40 divisors (see below), whose sum is σ = 166298865120. Its totient is φ = 19312125696.

The previous prime is 61155065579. The next prime is 61155065689. The reversal of 61155065616 is 61656055116.

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, 33527085 + ... + 33528908.

It is an arithmetic number, because the mean of its divisors is an integer number (4157471628).

Almost surely, 2^61155065616 is an apocalyptic number.

It is an amenable number.

61155065616 is an abundant number, since it is smaller than the sum of its proper divisors (105143799504).

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

61155065616 is a wasteful number, since it uses less digits than its factorization.

61155065616 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 67056023 (or 67056017 counting only the distinct ones).

The product of its (nonzero) digits is 162000, while the sum is 42.

The spelling of 61155065616 in words is "sixty-one billion, one hundred fifty-five million, sixty-five thousand, six hundred sixteen".