765161105553 has 12 divisors (see below), whose sum is σ = 1190250608820. Its totient is φ = 470868372576.

The previous prime is 765161105539. The next prime is 765161105591. The reversal of 765161105553 is 355501161567.

765161105553 is a `hidden beast` number, since 76 + 5 + 16 + 1 + 10 + 5 + 553 = 666.

It can be written as a sum of positive squares in 2 ways, for example, as 272424495249 + 492736610304 = 521943^2 + 701952^2 .

It is not a de Polignac number, because 765161105553 - 2¹² = 765161101457 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 765161105499 and 765161105508.

It is not an unprimeable number, because it can be changed into a prime (765161105593) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 3269919138 + ... + 3269919371.

It is an arithmetic number, because the mean of its divisors is an integer number (99187550735).

Almost surely, 2^765161105553 is an apocalyptic number.

It is an amenable number.

765161105553 is a deficient number, since it is larger than the sum of its proper divisors (425089503267).

765161105553 is a wasteful number, since it uses less digits than its factorization.

765161105553 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6539838528 (or 6539838525 counting only the distinct ones).

The product of its (nonzero) digits is 472500, while the sum is 45.

The spelling of 765161105553 in words is "seven hundred sixty-five billion, one hundred sixty-one million, one hundred five thousand, five hundred fifty-three".