157158729797 has 2 divisors, whose sum is σ = 157158729798. Its totient is φ = 157158729796.

The previous prime is 157158729779. The next prime is 157158729811. The reversal of 157158729797 is 797927851751.

It is a happy number.

Together with previous prime (157158729779) it forms an Ormiston pair, because they use the same digits, order apart.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 151600430881 + 5558298916 = 389359^2 + 74554^2 .

It is a cyclic number.

It is not a de Polignac number, because 157158729797 - 2²⁴ = 157141952581 is a prime.

It is a super-2 number, since 2×157158729797² (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 (157158729097) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 78579364898 + 78579364899.

It is an arithmetic number, because the mean of its divisors is an integer number (78579364899).

Almost surely, 2^157158729797 is an apocalyptic number.

It is an amenable number.

157158729797 is a deficient number, since it is larger than the sum of its proper divisors (1).

157158729797 is an equidigital number, since it uses as much as digits as its factorization.

157158729797 is an evil number, because the sum of its binary digits is even.

The product of its digits is 77792400, while the sum is 68.

The spelling of 157158729797 in words is "one hundred fifty-seven billion, one hundred fifty-eight million, seven hundred twenty-nine thousand, seven hundred ninety-seven".