10765631581 has 2 divisors, whose sum is σ = 10765631582. Its totient is φ = 10765631580.

The previous prime is 10765631579. The next prime is 10765631641. The reversal of 10765631581 is 18513656701.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 10234559556 + 531072025 = 101166^2 + 23045^2 .

It is a cyclic number.

It is not a de Polignac number, because 10765631581 - 2¹ = 10765631579 is a prime.

It is a super-2 number, since 2×10765631581² (a number of 21 digits) contains 22 as substring.

Together with 10765631579, it forms a pair of twin primes.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (10765631501) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5382815790 + 5382815791.

It is an arithmetic number, because the mean of its divisors is an integer number (5382815791).

Almost surely, 2^10765631581 is an apocalyptic number.

It is an amenable number.

10765631581 is a deficient number, since it is larger than the sum of its proper divisors (1).

10765631581 is an equidigital number, since it uses as much as digits as its factorization.

10765631581 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 151200, while the sum is 43.

The spelling of 10765631581 in words is "ten billion, seven hundred sixty-five million, six hundred thirty-one thousand, five hundred eighty-one".