6465478590 has 64 divisors (see below), whose sum is σ = 18255481920. Its totient is φ = 1622707200.

The previous prime is 6465478571. The next prime is 6465478661. The reversal of 6465478590 is 958745646.

6465478590 is a `hidden beast` number, since 6 + 4 + 6 + 5 + 47 + 8 + 590 = 666.

It is a Harshad number since it is a multiple of its sum of digits (54).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 699711 + ... + 708890.

It is an arithmetic number, because the mean of its divisors is an integer number (285241905).

Almost surely, 2^6465478590 is an apocalyptic number.

6465478590 is an abundant number, since it is smaller than the sum of its proper divisors (11790003330).

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

6465478590 is a wasteful number, since it uses less digits than its factorization.

6465478590 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1408634 (or 1408628 counting only the distinct ones).

The product of its (nonzero) digits is 7257600, while the sum is 54.

The square root of 6465478590 is about 80408.1997684316. The cubic root of 6465478590 is about 1862.9458262802.

The spelling of 6465478590 in words is "six billion, four hundred sixty-five million, four hundred seventy-eight thousand, five hundred ninety".