1649566080 has 128 divisors (see below), whose sum is σ = 5842274400. Its totient is φ = 439879680.

The previous prime is 1649566021. The next prime is 1649566091. The reversal of 1649566080 is 806659461.

1649566080 is a `hidden beast` number, since 1 + 6 + 4 + 9 + 566 + 0 + 80 = 666.

It is a tau number, because it is divible by the number of its divisors (128).

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

It is a congruent number.

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, 30451 + ... + 65010.

Almost surely, 2^1649566080 is an apocalyptic number.

1649566080 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1649566080 is an abundant number, since it is smaller than the sum of its proper divisors (4192708320).

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

1649566080 is an equidigital number, since it uses as much as digits as its factorization.

1649566080 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 95489 (or 95471 counting only the distinct ones).

The product of its (nonzero) digits is 311040, while the sum is 45.

The square root of 1649566080 is about 40614.8504859983. The cubic root of 1649566080 is about 1181.5621558500.

The spelling of 1649566080 in words is "one billion, six hundred forty-nine million, five hundred sixty-six thousand, eighty".