157443171497 has 2 divisors, whose sum is σ = 157443171498. Its totient is φ = 157443171496.

The previous prime is 157443171451. The next prime is 157443171503. The reversal of 157443171497 is 794171344751.

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., 112724033536 + 44719137961 = 335744^2 + 211469^2 .

It is a cyclic number.

It is not a de Polignac number, because 157443171497 - 2³² = 153148204201 is a prime.

It is not a weakly prime, because it can be changed into another prime (157443171997) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 78721585748 + 78721585749.

It is an arithmetic number, because the mean of its divisors is an integer number (78721585749).

Almost surely, 2^157443171497 is an apocalyptic number.

It is an amenable number.

157443171497 is a deficient number, since it is larger than the sum of its proper divisors (1).

157443171497 is an equidigital number, since it uses as much as digits as its factorization.

157443171497 is an evil number, because the sum of its binary digits is even.

The product of its digits is 2963520, while the sum is 53.

The spelling of 157443171497 in words is "one hundred fifty-seven billion, four hundred forty-three million, one hundred seventy-one thousand, four hundred ninety-seven".