11557489495489 has 6 divisors (see below), whose sum is σ = 13444426556034. Its totient is φ = 9906419567520.

The previous prime is 11557489495451. The next prime is 11557489495529. The reversal of 11557489495489 is 98459498475511.

It can be written as a sum of positive squares in only one way, i.e., 7643521854864 + 3913967640625 = 2764692^2 + 1978375^2 .

It is not a de Polignac number, because 11557489495489 - 2¹¹ = 11557489493441 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (11557489495429) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 117933566232 + ... + 117933566329.

It is an arithmetic number, because the mean of its divisors is an integer number (2240737759339).

Almost surely, 2^{11557489495489} is an apocalyptic number.

It is an amenable number.

11557489495489 is a deficient number, since it is larger than the sum of its proper divisors (1886937060545).

11557489495489 is an equidigital number, since it uses as much as digits as its factorization.

11557489495489 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 235867132575 (or 235867132568 counting only the distinct ones).

The product of its digits is 2612736000, while the sum is 79.

The spelling of 11557489495489 in words is "eleven trillion, five hundred fifty-seven billion, four hundred eighty-nine million, four hundred ninety-five thousand, four hundred eighty-nine".