157630371491 has 2 divisors, whose sum is σ = 157630371492. Its totient is φ = 157630371490.

The previous prime is 157630371443. The next prime is 157630371523. The reversal of 157630371491 is 194173036751.

It is a strong prime.

It is an emirp because it is prime and its reverse (194173036751) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 157630371491 - 2¹⁴ = 157630355107 is a prime.

It is not a weakly prime, because it can be changed into another prime (157630371401) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 78815185745 + 78815185746.

It is an arithmetic number, because the mean of its divisors is an integer number (78815185746).

Almost surely, 2^157630371491 is an apocalyptic number.

157630371491 is a deficient number, since it is larger than the sum of its proper divisors (1).

157630371491 is an equidigital number, since it uses as much as digits as its factorization.

157630371491 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 476280, while the sum is 47.

The spelling of 157630371491 in words is "one hundred fifty-seven billion, six hundred thirty million, three hundred seventy-one thousand, four hundred ninety-one".