1640400553913 has 16 divisors (see below), whose sum is σ = 1831629070656. Its totient is φ = 1456207247040.

The previous prime is 1640400553861. The next prime is 1640400553933. The reversal of 1640400553913 is 3193550040461.

It is a happy number.

It is a cyclic number.

It is not a de Polignac number, because 1640400553913 - 2⁶ = 1640400553849 is a prime.

It is a super-2 number, since 2×1640400553913² (a number of 25 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (1640400553933) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1339295 + ... + 2252667.

It is an arithmetic number, because the mean of its divisors is an integer number (114476816916).

Almost surely, 2^{1640400553913} is an apocalyptic number.

It is an amenable number.

1640400553913 is a deficient number, since it is larger than the sum of its proper divisors (191228516743).

1640400553913 is a wasteful number, since it uses less digits than its factorization.

1640400553913 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 917224.

The product of its (nonzero) digits is 194400, while the sum is 41.

The spelling of 1640400553913 in words is "one trillion, six hundred forty billion, four hundred million, five hundred fifty-three thousand, nine hundred thirteen".