78732262549 has 2 divisors, whose sum is σ = 78732262550. Its totient is φ = 78732262548.

The previous prime is 78732262517. The next prime is 78732262589. The reversal of 78732262549 is 94526223787.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 56831222449 + 21901040100 = 238393^2 + 147990^2 .

It is a cyclic number.

It is not a de Polignac number, because 78732262549 - 2⁵ = 78732262517 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 78732262549.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (78732262589) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 39366131274 + 39366131275.

It is an arithmetic number, because the mean of its divisors is an integer number (39366131275).

Almost surely, 2^78732262549 is an apocalyptic number.

It is an amenable number.

78732262549 is a deficient number, since it is larger than the sum of its proper divisors (1).

78732262549 is an equidigital number, since it uses as much as digits as its factorization.

78732262549 is an evil number, because the sum of its binary digits is even.

The product of its digits is 10160640, while the sum is 55.

The spelling of 78732262549 in words is "seventy-eight billion, seven hundred thirty-two million, two hundred sixty-two thousand, five hundred forty-nine".