108963617557 has 2 divisors, whose sum is σ = 108963617558. Its totient is φ = 108963617556.

The previous prime is 108963617519. The next prime is 108963617573. The reversal of 108963617557 is 755716369801.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 77436419076 + 31527198481 = 278274^2 + 177559^2 .

It is a cyclic number.

It is not a de Polignac number, because 108963617557 - 2⁷ = 108963617429 is a prime.

It is a super-2 number, since 2×108963617557² (a number of 23 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (108963611557) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 54481808778 + 54481808779.

It is an arithmetic number, because the mean of its divisors is an integer number (54481808779).

Almost surely, 2^108963617557 is an apocalyptic number.

It is an amenable number.

108963617557 is a deficient number, since it is larger than the sum of its proper divisors (1).

108963617557 is an equidigital number, since it uses as much as digits as its factorization.

108963617557 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 9525600, while the sum is 58.

The spelling of 108963617557 in words is "one hundred eight billion, nine hundred sixty-three million, six hundred seventeen thousand, five hundred fifty-seven".