1640308931307 has 40 divisors (see below), whose sum is σ = 2501786010240. Its totient is φ = 1070665240320.

The previous prime is 1640308931299. The next prime is 1640308931357. The reversal of 1640308931307 is 7031398030461.

1640308931307 is a `hidden beast` number, since 1 + 6 + 4 + 0 + 308 + 9 + 31 + 307 = 666.

It is not a de Polignac number, because 1640308931307 - 2³ = 1640308931299 is a prime.

It is a super-2 number, since 2×1640308931307² (a number of 25 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (1640308931357) by changing a digit.

It is a polite number, since it can be written in 39 ways as a sum of consecutive naturals, for example, 1657507 + ... + 2455187.

It is an arithmetic number, because the mean of its divisors is an integer number (62544650256).

Almost surely, 2^{1640308931307} is an apocalyptic number.

1640308931307 is a deficient number, since it is larger than the sum of its proper divisors (861477078933).

1640308931307 is an equidigital number, since it uses as much as digits as its factorization.

1640308931307 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 798225 (or 798216 counting only the distinct ones).

The product of its (nonzero) digits is 326592, while the sum is 45.

The spelling of 1640308931307 in words is "one trillion, six hundred forty billion, three hundred eight million, nine hundred thirty-one thousand, three hundred seven".