61003653864 has 16 divisors (see below), whose sum is σ = 152509134720. Its totient is φ = 20334551280.

The previous prime is 61003653863. The next prime is 61003653883. The reversal of 61003653864 is 46835630016.

It is not an unprimeable number, because it can be changed into a prime (61003653863) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1270909432 + ... + 1270909479.

It is an arithmetic number, because the mean of its divisors is an integer number (9531820920).

Almost surely, 2^61003653864 is an apocalyptic number.

It is an amenable number.

61003653864 is an abundant number, since it is smaller than the sum of its proper divisors (91505480856).

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

61003653864 is a wasteful number, since it uses less digits than its factorization.

61003653864 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2541818920 (or 2541818916 counting only the distinct ones).

The product of its (nonzero) digits is 311040, while the sum is 42.

The spelling of 61003653864 in words is "sixty-one billion, three million, six hundred fifty-three thousand, eight hundred sixty-four".