1640997071307 has 72 divisors (see below), whose sum is σ = 2703394022784. Its totient is φ = 957470976000.

The previous prime is 1640997071281. The next prime is 1640997071323. The reversal of 1640997071307 is 7031707990461.

1640997071307 is a `hidden beast` number, since 16 + 409 + 97 + 0 + 7 + 130 + 7 = 666.

It is not a de Polignac number, because 1640997071307 - 2⁶ = 1640997071243 is a prime.

It is not an unprimeable number, because it can be changed into a prime (1640997031307) by changing a digit.

It is a polite number, since it can be written in 71 ways as a sum of consecutive naturals, for example, 6389557 + ... + 6641417.

Almost surely, 2^{1640997071307} is an apocalyptic number.

1640997071307 is a deficient number, since it is larger than the sum of its proper divisors (1062396951477).

1640997071307 is a wasteful number, since it uses less digits than its factorization.

1640997071307 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 252113 (or 252099 counting only the distinct ones).

The product of its (nonzero) digits is 2000376, while the sum is 54.

The spelling of 1640997071307 in words is "one trillion, six hundred forty billion, nine hundred ninety-seven million, seventy-one thousand, three hundred seven".