647244265 has 16 divisors (see below), whose sum is σ = 813888000. Its totient is φ = 493189312.

The previous prime is 647244251. The next prime is 647244277. The reversal of 647244265 is 562442746.

It is a cyclic number.

It is not a de Polignac number, because 647244265 - 2⁵ = 647244233 is a prime.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 15711 + ... + 39259.

It is an arithmetic number, because the mean of its divisors is an integer number (50868000).

Almost surely, 2^647244265 is an apocalyptic number.

It is an amenable number.

647244265 is a deficient number, since it is larger than the sum of its proper divisors (166643735).

647244265 is a wasteful number, since it uses less digits than its factorization.

647244265 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 23816.

The product of its digits is 322560, while the sum is 40.

The square root of 647244265 is about 25440.9957548835. The cubic root of 647244265 is about 865.0132043826.

The spelling of 647244265 in words is "six hundred forty-seven million, two hundred forty-four thousand, two hundred sixty-five".