18542555555737 has 2 divisors, whose sum is σ = 18542555555738. Its totient is φ = 18542555555736.

The previous prime is 18542555555677. The next prime is 18542555555747. The reversal of 18542555555737 is 73755555524581.

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., 15055144969216 + 3487410586521 = 3880096^2 + 1867461^2 .

It is a cyclic number.

It is not a de Polignac number, because 18542555555737 - 2²³ = 18542547167129 is a prime.

It is a super-2 number, since 2×18542555555737² (a number of 27 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (18542555555747) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 9271277777868 + 9271277777869.

It is an arithmetic number, because the mean of its divisors is an integer number (9271277777869).

Almost surely, 2^{18542555555737} is an apocalyptic number.

It is an amenable number.

18542555555737 is a deficient number, since it is larger than the sum of its proper divisors (1).

18542555555737 is an equidigital number, since it uses as much as digits as its factorization.

18542555555737 is an evil number, because the sum of its binary digits is even.

The product of its digits is 735000000, while the sum is 67.

The spelling of 18542555555737 in words is "eighteen trillion, five hundred forty-two billion, five hundred fifty-five million, five hundred fifty-five thousand, seven hundred thirty-seven".