78993297634 has 8 divisors (see below), whose sum is σ = 120725605980. Its totient is φ = 38751428976.

The previous prime is 78993297629. The next prime is 78993297637. The reversal of 78993297634 is 43679239987.

It can be written as a sum of positive squares in 2 ways, for example, as 71879218609 + 7114079025 = 268103^2 + 84345^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a self number, because there is not a number n which added to its sum of digits gives 78993297634.

It is not an unprimeable number, because it can be changed into a prime (78993297637) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 372609789 + ... + 372610000.

Almost surely, 2^78993297634 is an apocalyptic number.

78993297634 is a deficient number, since it is larger than the sum of its proper divisors (41732308346).

78993297634 is a wasteful number, since it uses less digits than its factorization.

78993297634 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 745219844.

The product of its digits is 123451776, while the sum is 67.

The spelling of 78993297634 in words is "seventy-eight billion, nine hundred ninety-three million, two hundred ninety-seven thousand, six hundred thirty-four".