647360465 has 4 divisors (see below), whose sum is σ = 776832564. Its totient is φ = 517888368.

The previous prime is 647360431. The next prime is 647360471. The reversal of 647360465 is 564063746.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 363741184 + 283619281 = 19072^2 + 16841^2 .

It is a cyclic number.

It is not a de Polignac number, because 647360465 - 2¹⁶ = 647294929 is a prime.

It is a Duffinian number.

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, 64736042 + ... + 64736051.

It is an arithmetic number, because the mean of its divisors is an integer number (194208141).

Almost surely, 2^647360465 is an apocalyptic number.

It is an amenable number.

647360465 is a deficient number, since it is larger than the sum of its proper divisors (129472099).

647360465 is a wasteful number, since it uses less digits than its factorization.

647360465 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 129472098.

The product of its (nonzero) digits is 362880, while the sum is 41.

The square root of 647360465 is about 25443.2793680374. The cubic root of 647360465 is about 865.0649666643.

The spelling of 647360465 in words is "six hundred forty-seven million, three hundred sixty thousand, four hundred sixty-five".