157161761 has 2 divisors, whose sum is σ = 157161762. Its totient is φ = 157161760.

The previous prime is 157161751. The next prime is 157161769. The reversal of 157161761 is 167161751.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 110649361 + 46512400 = 10519^2 + 6820^2 .

It is a cyclic number.

It is not a de Polignac number, because 157161761 - 2¹⁰ = 157160737 is a prime.

It is a super-2 number, since 2×157161761² = 49399638241242242, which contains 22 as substring.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (157161769) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 78580880 + 78580881.

It is an arithmetic number, because the mean of its divisors is an integer number (78580881).

Almost surely, 2^157161761 is an apocalyptic number.

It is an amenable number.

157161761 is a deficient number, since it is larger than the sum of its proper divisors (1).

157161761 is an equidigital number, since it uses as much as digits as its factorization.

157161761 is an evil number, because the sum of its binary digits is even.

The product of its digits is 8820, while the sum is 35.

The square root of 157161761 is about 12536.4173909455. The cubic root of 157161761 is about 539.6542837441.

The spelling of 157161761 in words is "one hundred fifty-seven million, one hundred sixty-one thousand, seven hundred sixty-one".