90159953477639 has 2 divisors, whose sum is σ = 90159953477640. Its totient is φ = 90159953477638.

The previous prime is 90159953477611. The next prime is 90159953477663. The reversal of 90159953477639 is 93677435995109.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 90159953477639 - 2³² = 90155658510343 is a prime.

It is a super-2 number, since 2×90159953477639² (a number of 29 digits) contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 90159953477639.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (90159953477939) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 45079976738819 + 45079976738820.

It is an arithmetic number, because the mean of its divisors is an integer number (45079976738820).

Almost surely, 2^{90159953477639} is an apocalyptic number.

90159953477639 is a deficient number, since it is larger than the sum of its proper divisors (1).

90159953477639 is an equidigital number, since it uses as much as digits as its factorization.

90159953477639 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1736040600, while the sum is 77.

The spelling of 90159953477639 in words is "ninety trillion, one hundred fifty-nine billion, nine hundred fifty-three million, four hundred seventy-seven thousand, six hundred thirty-nine".