1649142916 has 12 divisors (see below), whose sum is σ = 2896272540. Its totient is φ = 821636480.

The previous prime is 1649142893. The next prime is 1649142961. The reversal of 1649142916 is 6192419461.

It can be written as a sum of positive squares in 2 ways, for example, as 360620100 + 1288522816 = 18990^2 + 35896^2 .

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 732481 + ... + 734728.

It is an arithmetic number, because the mean of its divisors is an integer number (241356045).

Almost surely, 2^1649142916 is an apocalyptic number.

It is an amenable number.

1649142916 is a deficient number, since it is larger than the sum of its proper divisors (1247129624).

1649142916 is a wasteful number, since it uses less digits than its factorization.

1649142916 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1467494 (or 1467492 counting only the distinct ones).

The product of its digits is 93312, while the sum is 43.

The square root of 1649142916 is about 40609.6406780459. The cubic root of 1649142916 is about 1181.4611116350.

The spelling of 1649142916 in words is "one billion, six hundred forty-nine million, one hundred forty-two thousand, nine hundred sixteen".