6516455040 has 96 divisors (see below), whose sum is σ = 22502153700. Its totient is φ = 1737719808.

The previous prime is 6516455027. The next prime is 6516455051. The reversal of 6516455040 is 405546156.

6516455040 is a `hidden beast` number, since 6 + 5 + 1 + 64 + 550 + 40 = 666.

It can be written as a sum of positive squares in 2 ways, for example, as 6437173824 + 79281216 = 80232^2 + 8904^2 .

It is a tau number, because it is divible by the number of its divisors (96).

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a junction number, because it is equal to n+sod(n) for n = 6516454986 and 6516455004.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 559905 + ... + 571424.

Almost surely, 2^6516455040 is an apocalyptic number.

6516455040 is a gapful number since it is divisible by the number (60) formed by its first and last digit.

It is an amenable number.

6516455040 is an abundant number, since it is smaller than the sum of its proper divisors (15985698660).

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

6516455040 is a wasteful number, since it uses less digits than its factorization.

6516455040 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1131354 (or 1131339 counting only the distinct ones).

The product of its (nonzero) digits is 72000, while the sum is 36.

The square root of 6516455040 is about 80724.5628046383. The cubic root of 6516455040 is about 1867.8290877718.

The spelling of 6516455040 in words is "six billion, five hundred sixteen million, four hundred fifty-five thousand, forty".