1640115403 has 2 divisors, whose sum is σ = 1640115404. Its totient is φ = 1640115402.

The previous prime is 1640115383. The next prime is 1640115437. The reversal of 1640115403 is 3045110461.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 1640115403 - 2⁵ = 1640115371 is a prime.

It is not a weakly prime, because it can be changed into another prime (1640115493) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 820057701 + 820057702.

It is an arithmetic number, because the mean of its divisors is an integer number (820057702).

Almost surely, 2^1640115403 is an apocalyptic number.

1640115403 is a deficient number, since it is larger than the sum of its proper divisors (1).

1640115403 is an equidigital number, since it uses as much as digits as its factorization.

1640115403 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1440, while the sum is 25.

The square root of 1640115403 is about 40498.3382745515. The cubic root of 1640115403 is about 1179.3013682647.

Adding to 1640115403 its reverse (3045110461), we get a palindrome (4685225864).

The spelling of 1640115403 in words is "one billion, six hundred forty million, one hundred fifteen thousand, four hundred three".