78663922738 has 8 divisors (see below), whose sum is σ = 118021644288. Its totient is φ = 39323374644.

The previous prime is 78663922681. The next prime is 78663922817. The reversal of 78663922738 is 83722936687.

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

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 4281906 + ... + 4300237.

It is an arithmetic number, because the mean of its divisors is an integer number (14752705536).

Almost surely, 2^78663922738 is an apocalyptic number.

78663922738 is a deficient number, since it is larger than the sum of its proper divisors (39357721550).

78663922738 is a wasteful number, since it uses less digits than its factorization.

78663922738 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8586728.

The product of its digits is 36578304, while the sum is 61.

The spelling of 78663922738 in words is "seventy-eight billion, six hundred sixty-three million, nine hundred twenty-two thousand, seven hundred thirty-eight".