1649464739 has 8 divisors (see below), whose sum is σ = 1776740112. Its totient is φ = 1522245600.

The previous prime is 1649464703. The next prime is 1649464777. The reversal of 1649464739 is 9374649461.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1649464739 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1649464139) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 62237 + ... + 84689.

It is an arithmetic number, because the mean of its divisors is an integer number (222092514).

Almost surely, 2^1649464739 is an apocalyptic number.

1649464739 is a deficient number, since it is larger than the sum of its proper divisors (127275373).

1649464739 is a wasteful number, since it uses less digits than its factorization.

1649464739 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 28117.

The product of its digits is 3919104, while the sum is 53.

The square root of 1649464739 is about 40613.6028813007. The cubic root of 1649464739 is about 1181.5379589528.

The spelling of 1649464739 in words is "one billion, six hundred forty-nine million, four hundred sixty-four thousand, seven hundred thirty-nine".