157321761791 has 2 divisors, whose sum is σ = 157321761792. Its totient is φ = 157321761790.

The previous prime is 157321761761. The next prime is 157321761827. The reversal of 157321761791 is 197167123751.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 157321761791 - 2³⁴ = 140141892607 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (157321761761) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 78660880895 + 78660880896.

It is an arithmetic number, because the mean of its divisors is an integer number (78660880896).

Almost surely, 2^157321761791 is an apocalyptic number.

157321761791 is a deficient number, since it is larger than the sum of its proper divisors (1).

157321761791 is an equidigital number, since it uses as much as digits as its factorization.

157321761791 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 555660, while the sum is 50.

The spelling of 157321761791 in words is "one hundred fifty-seven billion, three hundred twenty-one million, seven hundred sixty-one thousand, seven hundred ninety-one".