719721664 has 14 divisors (see below), whose sum is σ = 1428197804. Its totient is φ = 359860800.

The previous prime is 719721643. The next prime is 719721671. The reversal of 719721664 is 466127917.

It is a self number, because there is not a number n which added to its sum of digits gives 719721664.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5622762 + ... + 5622889.

Almost surely, 2^719721664 is an apocalyptic number.

It is an amenable number.

719721664 is a deficient number, since it is larger than the sum of its proper divisors (708476140).

719721664 is a wasteful number, since it uses less digits than its factorization.

719721664 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11245663 (or 11245653 counting only the distinct ones).

The product of its digits is 127008, while the sum is 43.

The square root of 719721664 is about 26827.6287435174. The cubic root of 719721664 is about 896.1654403265.

The spelling of 719721664 in words is "seven hundred nineteen million, seven hundred twenty-one thousand, six hundred sixty-four".