61340572064 has 24 divisors (see below), whose sum is σ = 121505146560. Its totient is φ = 30482122176.

The previous prime is 61340572019. The next prime is 61340572081. The reversal of 61340572064 is 46027504316.

It is a happy number.

It is a super-2 number, since 2×61340572064² (a number of 22 digits) contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 5874824 + ... + 5885255.

It is an arithmetic number, because the mean of its divisors is an integer number (5062714440).

Almost surely, 2^61340572064 is an apocalyptic number.

It is an amenable number.

61340572064 is a deficient number, since it is larger than the sum of its proper divisors (60164574496).

61340572064 is a wasteful number, since it uses less digits than its factorization.

61340572064 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11760252 (or 11760244 counting only the distinct ones).

The product of its (nonzero) digits is 120960, while the sum is 38.

The spelling of 61340572064 in words is "sixty-one billion, three hundred forty million, five hundred seventy-two thousand, sixty-four".