68002157357 has 2 divisors, whose sum is σ = 68002157358. Its totient is φ = 68002157356.

The previous prime is 68002157269. The next prime is 68002157389. The reversal of 68002157357 is 75375120086.

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., 53035326436 + 14966830921 = 230294^2 + 122339^2 .

It is a cyclic number.

It is not a de Polignac number, because 68002157357 - 2²² = 67997963053 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (68002157057) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 34001078678 + 34001078679.

It is an arithmetic number, because the mean of its divisors is an integer number (34001078679).

Almost surely, 2^68002157357 is an apocalyptic number.

It is an amenable number.

68002157357 is a deficient number, since it is larger than the sum of its proper divisors (1).

68002157357 is an equidigital number, since it uses as much as digits as its factorization.

68002157357 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 352800, while the sum is 44.

The spelling of 68002157357 in words is "sixty-eight billion, two million, one hundred fifty-seven thousand, three hundred fifty-seven".