61918061064 has 32 divisors (see below), whose sum is σ = 154852372320. Its totient is φ = 20631724416.

The previous prime is 61918061063. The next prime is 61918061069. The reversal of 61918061064 is 46016081916.

It is not an unprimeable number, because it can be changed into a prime (61918061063) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 410362 + ... + 540585.

It is an arithmetic number, because the mean of its divisors is an integer number (4839136635).

Almost surely, 2^61918061064 is an apocalyptic number.

It is an amenable number.

61918061064 is an abundant number, since it is smaller than the sum of its proper divisors (92934311256).

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

61918061064 is a wasteful number, since it uses less digits than its factorization.

61918061064 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 953669 (or 953665 counting only the distinct ones).

The product of its (nonzero) digits is 62208, while the sum is 42.

The spelling of 61918061064 in words is "sixty-one billion, nine hundred eighteen million, sixty-one thousand, sixty-four".