610721650064 has 10 divisors (see below), whose sum is σ = 1183273197030. Its totient is φ = 305360825024.

The previous prime is 610721650043. The next prime is 610721650093. The reversal of 610721650064 is 460056127016.

It can be written as a sum of positive squares in only one way, i.e., 535092250000 + 75629400064 = 731500^2 + 275008^2 .

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 19085051549 + ... + 19085051580.

It is an arithmetic number, because the mean of its divisors is an integer number (118327319703).

Almost surely, 2^610721650064 is an apocalyptic number.

It is an amenable number.

610721650064 is a deficient number, since it is larger than the sum of its proper divisors (572551546966).

610721650064 is a wasteful number, since it uses less digits than its factorization.

610721650064 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 38170103137 (or 38170103131 counting only the distinct ones).

The product of its (nonzero) digits is 60480, while the sum is 38.

The spelling of 610721650064 in words is "six hundred ten billion, seven hundred twenty-one million, six hundred fifty thousand, sixty-four".