6465366540 has 60 divisors (see below), whose sum is σ = 20282099376. Its totient is φ = 1724097312.

The previous prime is 6465366503. The next prime is 6465366599. The reversal of 6465366540 is 456635646.

6465366540 is a `hidden beast` number, since 6 + 46 + 5 + 3 + 66 + 540 = 666.

It is a tau number, because it is divible by the number of its divisors (60).

It is a Harshad number since it is a multiple of its sum of digits (45).

It is an unprimeable number.

It is a polite number, since it can be written in 19 ways as a sum of consecutive naturals, for example, 1993864 + ... + 1997103.

Almost surely, 2^6465366540 is an apocalyptic number.

6465366540 is a gapful number since it is divisible by the number (60) formed by its first and last digit.

It is an amenable number.

6465366540 is an abundant number, since it is smaller than the sum of its proper divisors (13816732836).

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

6465366540 is a wasteful number, since it uses less digits than its factorization.

6465366540 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3990988 (or 3990977 counting only the distinct ones).

The product of its (nonzero) digits is 1555200, while the sum is 45.

The square root of 6465366540 is about 80407.5030081149. The cubic root of 6465366540 is about 1862.9350642882.

The spelling of 6465366540 in words is "six billion, four hundred sixty-five million, three hundred sixty-six thousand, five hundred forty".