1162640581 has 2 divisors, whose sum is σ = 1162640582. Its totient is φ = 1162640580.

The previous prime is 1162640573. The next prime is 1162640587. The reversal of 1162640581 is 1850462611.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 1113289956 + 49350625 = 33366^2 + 7025^2 .

It is a cyclic number.

It is not a de Polignac number, because 1162640581 - 2³ = 1162640573 is a prime.

It is a super-2 number, since 2×1162640581² = 2703466241176035122, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1162640587) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 581320290 + 581320291.

It is an arithmetic number, because the mean of its divisors is an integer number (581320291).

Almost surely, 2^1162640581 is an apocalyptic number.

It is an amenable number.

1162640581 is a deficient number, since it is larger than the sum of its proper divisors (1).

1162640581 is an equidigital number, since it uses as much as digits as its factorization.

1162640581 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 11520, while the sum is 34.

The square root of 1162640581 is about 34097.5157599494. The cubic root of 1162640581 is about 1051.5142418152.

The spelling of 1162640581 in words is "one billion, one hundred sixty-two million, six hundred forty thousand, five hundred eighty-one".