1649134916 has 48 divisors (see below), whose sum is σ = 3395027328. Its totient is φ = 691027200.

The previous prime is 1649134913. The next prime is 1649134933. The reversal of 1649134916 is 6194319461.

It is a Harshad number since it is a multiple of its sum of digits (44).

It is not an unprimeable number, because it can be changed into a prime (1649134913) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 589481 + ... + 592271.

It is an arithmetic number, because the mean of its divisors is an integer number (70729736).

Almost surely, 2^1649134916 is an apocalyptic number.

It is an amenable number.

1649134916 is an abundant number, since it is smaller than the sum of its proper divisors (1745892412).

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

1649134916 is a wasteful number, since it uses less digits than its factorization.

1649134916 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3852 (or 3850 counting only the distinct ones).

The product of its digits is 139968, while the sum is 44.

The square root of 1649134916 is about 40609.5421791480. The cubic root of 1649134916 is about 1181.4592012074.

The spelling of 1649134916 in words is "one billion, six hundred forty-nine million, one hundred thirty-four thousand, nine hundred sixteen".