155500117757 has 2 divisors, whose sum is σ = 155500117758. Its totient is φ = 155500117756.

The previous prime is 155500117723. The next prime is 155500117769. The reversal of 155500117757 is 757711005551.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 132389733316 + 23110384441 = 363854^2 + 152021^2 .

It is a cyclic number.

It is not a de Polignac number, because 155500117757 - 2⁸ = 155500117501 is a prime.

It is a super-2 number, since 2×155500117757² (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 (155500117457) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 77750058878 + 77750058879.

It is an arithmetic number, because the mean of its divisors is an integer number (77750058879).

Almost surely, 2^155500117757 is an apocalyptic number.

It is an amenable number.

155500117757 is a deficient number, since it is larger than the sum of its proper divisors (1).

155500117757 is an equidigital number, since it uses as much as digits as its factorization.

155500117757 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 214375, while the sum is 44.

The spelling of 155500117757 in words is "one hundred fifty-five billion, five hundred million, one hundred seventeen thousand, seven hundred fifty-seven".