721464654 has 16 divisors (see below), whose sum is σ = 1463253120. Its totient is φ = 237100920.

The previous prime is 721464631. The next prime is 721464661. The reversal of 721464654 is 456464127.

It is a super-2 number, since 2×721464654² = 1041022493942679432, which contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 846364 + ... + 847215.

It is an arithmetic number, because the mean of its divisors is an integer number (91453320).

Almost surely, 2^721464654 is an apocalyptic number.

721464654 is an abundant number, since it is smaller than the sum of its proper divisors (741788466).

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

721464654 is a wasteful number, since it uses less digits than its factorization.

721464654 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1693655.

The product of its digits is 161280, while the sum is 39.

The square root of 721464654 is about 26860.0940802522. The cubic root of 721464654 is about 896.8882883567. Note that the first 3 decimals are identical.

The spelling of 721464654 in words is "seven hundred twenty-one million, four hundred sixty-four thousand, six hundred fifty-four".