1640943360015 has 36 divisors (see below), whose sum is σ = 2649854902344. Its totient is φ = 867128573696.

The previous prime is 1640943360013. The next prime is 1640943360037. The reversal of 1640943360015 is 5100633490461.

It is a happy number.

It is not a de Polignac number, because 1640943360015 - 2¹ = 1640943360013 is a prime.

It is a super-2 number, since 2×1640943360015² (a number of 25 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1640943360011) by changing a digit.

It is a polite number, since it can be written in 35 ways as a sum of consecutive naturals, for example, 560621482 + ... + 560624408.

Almost surely, 2^{1640943360015} is an apocalyptic number.

1640943360015 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

1640943360015 is a deficient number, since it is larger than the sum of its proper divisors (1008911542329).

1640943360015 is an frugal number, since it uses more digits than its factorization.

1640943360015 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6088 (or 3048 counting only the distinct ones).

The product of its (nonzero) digits is 233280, while the sum is 42.

The spelling of 1640943360015 in words is "one trillion, six hundred forty billion, nine hundred forty-three million, three hundred sixty thousand, fifteen".