1640133315 has 12 divisors (see below), whose sum is σ = 2842897824. Its totient is φ = 874737744.

The previous prime is 1640133311. The next prime is 1640133349. The reversal of 1640133315 is 5133310461.

1640133315 is a `hidden beast` number, since 1 + 640 + 1 + 3 + 3 + 3 + 15 = 666.

It is not a de Polignac number, because 1640133315 - 2² = 1640133311 is a prime.

It is not an unprimeable number, because it can be changed into a prime (1640133311) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 18223659 + ... + 18223748.

It is an arithmetic number, because the mean of its divisors is an integer number (236908152).

Almost surely, 2^1640133315 is an apocalyptic number.

1640133315 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

1640133315 is a deficient number, since it is larger than the sum of its proper divisors (1202764509).

1640133315 is a wasteful number, since it uses less digits than its factorization.

1640133315 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 36447418 (or 36447415 counting only the distinct ones).

The product of its (nonzero) digits is 3240, while the sum is 27.

The square root of 1640133315 is about 40498.5594188238. The cubic root of 1640133315 is about 1179.3056613710.

Adding to 1640133315 its reverse (5133310461), we get a palindrome (6773443776).

The spelling of 1640133315 in words is "one billion, six hundred forty million, one hundred thirty-three thousand, three hundred fifteen".