1640344277115 has 40 divisors (see below), whose sum is σ = 2951084613840. Its totient is φ = 871691917248.

The previous prime is 1640344277081. The next prime is 1640344277119. The reversal of 1640344277115 is 5117724430461.

It is not a de Polignac number, because 1640344277115 - 2⁶ = 1640344277051 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (45).

It is not an unprimeable number, because it can be changed into a prime (1640344277119) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 39 ways as a sum of consecutive naturals, for example, 7198705 + ... + 7423074.

It is an arithmetic number, because the mean of its divisors is an integer number (73777115346).

Almost surely, 2^{1640344277115} is an apocalyptic number.

1640344277115 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

1640344277115 is a deficient number, since it is larger than the sum of its proper divisors (1310740336725).

1640344277115 is a wasteful number, since it uses less digits than its factorization.

1640344277115 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 14622073 (or 14622064 counting only the distinct ones).

The product of its (nonzero) digits is 564480, while the sum is 45.

The spelling of 1640344277115 in words is "one trillion, six hundred forty billion, three hundred forty-four million, two hundred seventy-seven thousand, one hundred fifteen".