721274463 has 80 divisors (see below), whose sum is σ = 1353844800. Its totient is φ = 380261952.

The previous prime is 721274441. The next prime is 721274471. The reversal of 721274463 is 364472127.

721274463 is a `hidden beast` number, since 72 + 127 + 4 + 463 = 666.

It is not a de Polignac number, because 721274463 - 2⁸ = 721274207 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (721274413) by changing a digit.

It is a polite number, since it can be written in 79 ways as a sum of consecutive naturals, for example, 360181 + ... + 362177.

It is an arithmetic number, because the mean of its divisors is an integer number (16923060).

Almost surely, 2^721274463 is an apocalyptic number.

721274463 is a deficient number, since it is larger than the sum of its proper divisors (632570337).

721274463 is a wasteful number, since it uses less digits than its factorization.

721274463 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2043 (or 2020 counting only the distinct ones).

The product of its digits is 56448, while the sum is 36.

The square root of 721274463 is about 26856.5534460399. The cubic root of 721274463 is about 896.8094694933.

The spelling of 721274463 in words is "seven hundred twenty-one million, two hundred seventy-four thousand, four hundred sixty-three".