1649161215 has 80 divisors (see below), whose sum is σ = 3238250400. Its totient is φ = 797983488.

The previous prime is 1649161207. The next prime is 1649161237. The reversal of 1649161215 is 5121619461.

1649161215 is a `hidden beast` number, since 1 + 649 + 1 + 6 + 1 + 2 + 1 + 5 = 666.

It is not a de Polignac number, because 1649161215 - 2³ = 1649161207 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 1649161215.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 79 ways as a sum of consecutive naturals, for example, 307981 + ... + 313289.

It is an arithmetic number, because the mean of its divisors is an integer number (40478130).

Almost surely, 2^1649161215 is an apocalyptic number.

1649161215 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

1649161215 is a deficient number, since it is larger than the sum of its proper divisors (1589089185).

1649161215 is a wasteful number, since it uses less digits than its factorization.

1649161215 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5398 (or 5389 counting only the distinct ones).

The product of its digits is 12960, while the sum is 36.

The square root of 1649161215 is about 40609.8659810643. The cubic root of 1649161215 is about 1181.4654814760.

The spelling of 1649161215 in words is "one billion, six hundred forty-nine million, one hundred sixty-one thousand, two hundred fifteen".