721341064 has 16 divisors (see below), whose sum is σ = 1354406400. Its totient is φ = 360166032.

The previous prime is 721341029. The next prime is 721341073. The reversal of 721341064 is 460143127.

It is a super-2 number, since 2×721341064² = 1040665861225304192, which 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, 56952 + ... + 68455.

It is an arithmetic number, because the mean of its divisors is an integer number (84650400).

Almost surely, 2^721341064 is an apocalyptic number.

It is an amenable number.

721341064 is a deficient number, since it is larger than the sum of its proper divisors (633065336).

721341064 is a wasteful number, since it uses less digits than its factorization.

721341064 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 126132 (or 126128 counting only the distinct ones).

The product of its (nonzero) digits is 4032, while the sum is 28.

The square root of 721341064 is about 26857.7933568639. The cubic root of 721341064 is about 896.8370718242.

The spelling of 721341064 in words is "seven hundred twenty-one million, three hundred forty-one thousand, sixty-four".