1649921160 has 64 divisors (see below), whose sum is σ = 5005411200. Its totient is φ = 435032576.

The previous prime is 1649921159. The next prime is 1649921173. The reversal of 1649921160 is 611299461.

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, 66564 + ... + 87923.

It is an arithmetic number, because the mean of its divisors is an integer number (78209550).

Almost surely, 2^1649921160 is an apocalyptic number.

1649921160 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1649921160 is an abundant number, since it is smaller than the sum of its proper divisors (3355490040).

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

1649921160 is a wasteful number, since it uses less digits than its factorization.

1649921160 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 154590 (or 154586 counting only the distinct ones).

The product of its (nonzero) digits is 23328, while the sum is 39.

The square root of 1649921160 is about 40619.2215582721. The cubic root of 1649921160 is about 1181.6469294551.

The spelling of 1649921160 in words is "one billion, six hundred forty-nine million, nine hundred twenty-one thousand, one hundred sixty".