157278607349 has 2 divisors, whose sum is σ = 157278607350. Its totient is φ = 157278607348.

The previous prime is 157278607127. The next prime is 157278607373. The reversal of 157278607349 is 943706872751.

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., 99134930449 + 58143676900 = 314857^2 + 241130^2 .

It is a cyclic number.

It is not a de Polignac number, because 157278607349 - 2⁸ = 157278607093 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (157278607049) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 78639303674 + 78639303675.

It is an arithmetic number, because the mean of its divisors is an integer number (78639303675).

It is a 1-persistent number, because it is pandigital, but 2⋅157278607349 = 314557214698 is not.

Almost surely, 2^157278607349 is an apocalyptic number.

It is an amenable number.

157278607349 is a deficient number, since it is larger than the sum of its proper divisors (1).

157278607349 is an equidigital number, since it uses as much as digits as its factorization.

157278607349 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 17781120, while the sum is 59.

The spelling of 157278607349 in words is "one hundred fifty-seven billion, two hundred seventy-eight million, six hundred seven thousand, three hundred forty-nine".