1640396027403 has 18 divisors (see below), whose sum is σ = 2756311693044. Its totient is φ = 937369158264.

The previous prime is 1640396027393. The next prime is 1640396027411. The reversal of 1640396027403 is 3047206930461.

1640396027403 is a `hidden beast` number, since 1 + 6 + 4 + 0 + 39 + 602 + 7 + 4 + 0 + 3 = 666.

It is not a de Polignac number, because 1640396027403 - 2¹⁴ = 1640396011019 is a prime.

It is not an unprimeable number, because it can be changed into a prime (1640396027423) by changing a digit.

It is a polite number, since it can be written in 17 ways as a sum of consecutive naturals, for example, 1859859001 + ... + 1859859882.

Almost surely, 2^{1640396027403} is an apocalyptic number.

1640396027403 is a deficient number, since it is larger than the sum of its proper divisors (1115915665641).

1640396027403 is a wasteful number, since it uses less digits than its factorization.

1640396027403 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3719718903 (or 3719718893 counting only the distinct ones).

The product of its (nonzero) digits is 653184, while the sum is 45.

The spelling of 1640396027403 in words is "one trillion, six hundred forty billion, three hundred ninety-six million, twenty-seven thousand, four hundred three".