5901663663557 has 2 divisors, whose sum is σ = 5901663663558. Its totient is φ = 5901663663556.

The previous prime is 5901663663527. The next prime is 5901663663619. The reversal of 5901663663557 is 7553663661095.

It is a happy number.

It is an a-pointer prime, because the next prime (5901663663619) can be obtained adding 5901663663557 to its sum of digits (62).

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 5177622642721 + 724041020836 = 2275439^2 + 850906^2 .

It is a cyclic number.

It is not a de Polignac number, because 5901663663557 - 2¹⁰ = 5901663662533 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 5901663663557.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (5901663663517) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 2950831831778 + 2950831831779.

It is an arithmetic number, because the mean of its divisors is an integer number (2950831831779).

Almost surely, 2^{5901663663557} is an apocalyptic number.

It is an amenable number.

5901663663557 is a deficient number, since it is larger than the sum of its proper divisors (1).

5901663663557 is an equidigital number, since it uses as much as digits as its factorization.

5901663663557 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 91854000, while the sum is 62.

The spelling of 5901663663557 in words is "five trillion, nine hundred one billion, six hundred sixty-three million, six hundred sixty-three thousand, five hundred fifty-seven".