78732262561 has 4 divisors (see below), whose sum is σ = 78826104000. Its totient is φ = 78638421124.

The previous prime is 78732262549. The next prime is 78732262589. The reversal of 78732262561 is 16526223787.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 78732262561 - 2¹³ = 78732254369 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (78732212561) 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 3 ways as a sum of consecutive naturals, for example, 46919461 + ... + 46921138.

It is an arithmetic number, because the mean of its divisors is an integer number (19706526000).

Almost surely, 2^78732262561 is an apocalyptic number.

It is an amenable number.

78732262561 is a deficient number, since it is larger than the sum of its proper divisors (93841439).

78732262561 is an equidigital number, since it uses as much as digits as its factorization.

78732262561 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 93841438.

The product of its digits is 1693440, while the sum is 49.

It can be divided in two parts, 7873226 and 2561, that added together give a palindrome (7875787).

The spelling of 78732262561 in words is "seventy-eight billion, seven hundred thirty-two million, two hundred sixty-two thousand, five hundred sixty-one".