68274730157 has 2 divisors, whose sum is σ = 68274730158. Its totient is φ = 68274730156.

The previous prime is 68274730061. The next prime is 68274730171. The reversal of 68274730157 is 75103747286.

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., 66974334436 + 1300395721 = 258794^2 + 36061^2 .

It is a cyclic number.

It is not a de Polignac number, because 68274730157 - 2¹⁶ = 68274664621 is a prime.

It is a super-2 number, since 2×68274730157² (a number of 22 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (68274730457) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 34137365078 + 34137365079.

It is an arithmetic number, because the mean of its divisors is an integer number (34137365079).

Almost surely, 2^68274730157 is an apocalyptic number.

It is an amenable number.

68274730157 is a deficient number, since it is larger than the sum of its proper divisors (1).

68274730157 is an equidigital number, since it uses as much as digits as its factorization.

68274730157 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1975680, while the sum is 50.

The spelling of 68274730157 in words is "sixty-eight billion, two hundred seventy-four million, seven hundred thirty thousand, one hundred fifty-seven".