61020017106664 has 128 divisors (see below), whose sum is σ = 146551520747520. Its totient is φ = 23128869772800.

The previous prime is 61020017106641. The next prime is 61020017106691. The reversal of 61020017106664 is 46660171002016.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 1475277 + ... + 11145244.

It is an arithmetic number, because the mean of its divisors is an integer number (1144933755840).

Almost surely, 2^{61020017106664} is an apocalyptic number.

It is an amenable number.

61020017106664 is an abundant number, since it is smaller than the sum of its proper divisors (85531503640856).

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

61020017106664 is a wasteful number, since it uses less digits than its factorization.

61020017106664 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12620759 (or 12620755 counting only the distinct ones).

The product of its (nonzero) digits is 72576, while the sum is 40.

The spelling of 61020017106664 in words is "sixty-one trillion, twenty billion, seventeen million, one hundred six thousand, six hundred sixty-four".