1161551737 has 2 divisors, whose sum is σ = 1161551738. Its totient is φ = 1161551736.

The previous prime is 1161551669. The next prime is 1161551777. The reversal of 1161551737 is 7371551611.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 660284416 + 501267321 = 25696^2 + 22389^2 .

It is a cyclic number.

It is not a de Polignac number, because 1161551737 - 2⁷ = 1161551609 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 1161551696 and 1161551705.

It is not a weakly prime, because it can be changed into another prime (1161551777) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 580775868 + 580775869.

It is an arithmetic number, because the mean of its divisors is an integer number (580775869).

Almost surely, 2^1161551737 is an apocalyptic number.

It is an amenable number.

1161551737 is a deficient number, since it is larger than the sum of its proper divisors (1).

1161551737 is an equidigital number, since it uses as much as digits as its factorization.

1161551737 is an evil number, because the sum of its binary digits is even.

The product of its digits is 22050, while the sum is 37.

The square root of 1161551737 is about 34081.5454021674. The cubic root of 1161551737 is about 1051.1858822176.

The spelling of 1161551737 in words is "one billion, one hundred sixty-one million, five hundred fifty-one thousand, seven hundred thirty-seven".