1640136001639 has 2 divisors, whose sum is σ = 1640136001640. Its totient is φ = 1640136001638.

The previous prime is 1640136001589. The next prime is 1640136001663. The reversal of 1640136001639 is 9361006310461.

It is a happy number.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 1640136001639 - 2²⁷ = 1640001783911 is a prime.

It is a super-2 number, since 2×1640136001639² (a number of 25 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1640136001139) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 820068000819 + 820068000820.

It is an arithmetic number, because the mean of its divisors is an integer number (820068000820).

Almost surely, 2^{1640136001639} is an apocalyptic number.

1640136001639 is a deficient number, since it is larger than the sum of its proper divisors (1).

1640136001639 is an equidigital number, since it uses as much as digits as its factorization.

1640136001639 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 69984, while the sum is 40.

The spelling of 1640136001639 in words is "one trillion, six hundred forty billion, one hundred thirty-six million, one thousand, six hundred thirty-nine".