61577077064 has 32 divisors (see below), whose sum is σ = 118163622720. Its totient is φ = 30067039296.

The previous prime is 61577077049. The next prime is 61577077069. The reversal of 61577077064 is 46077077516.

It is a happy number.

It is not an unprimeable number, because it can be changed into a prime (61577077069) 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, 2383802 + ... + 2409494.

It is an arithmetic number, because the mean of its divisors is an integer number (3692613210).

Almost surely, 2^61577077064 is an apocalyptic number.

It is an amenable number.

61577077064 is a deficient number, since it is larger than the sum of its proper divisors (56586545656).

61577077064 is a wasteful number, since it uses less digits than its factorization.

61577077064 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 32709 (or 32705 counting only the distinct ones).

The product of its (nonzero) digits is 1728720, while the sum is 50.

The spelling of 61577077064 in words is "sixty-one billion, five hundred seventy-seven million, seventy-seven thousand, sixty-four".