157251738557 has 2 divisors, whose sum is σ = 157251738558. Its totient is φ = 157251738556.

The previous prime is 157251738517. The next prime is 157251738583. The reversal of 157251738557 is 755837152751.

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., 91004185561 + 66247552996 = 301669^2 + 257386^2 .

It is a cyclic number.

It is not a de Polignac number, because 157251738557 - 2¹⁸ = 157251476413 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (157251738517) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 78625869278 + 78625869279.

It is an arithmetic number, because the mean of its divisors is an integer number (78625869279).

Almost surely, 2^157251738557 is an apocalyptic number.

It is an amenable number.

157251738557 is a deficient number, since it is larger than the sum of its proper divisors (1).

157251738557 is an equidigital number, since it uses as much as digits as its factorization.

157251738557 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 10290000, while the sum is 56.

The spelling of 157251738557 in words is "one hundred fifty-seven billion, two hundred fifty-one million, seven hundred thirty-eight thousand, five hundred fifty-seven".