78459230732731 has 4 divisors (see below), whose sum is σ = 78459284429152. Its totient is φ = 78459177036312.

The previous prime is 78459230732723. The next prime is 78459230732777. The reversal of 78459230732731 is 13723703295487.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 78459230732731 - 2³ = 78459230732723 is a prime.

It is a super-2 number, since 2×78459230732731² (a number of 29 digits) contains 22 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 78459230732731.

It is not an unprimeable number, because it can be changed into a prime (78459230732791) 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, 24593340 + ... + 27599833.

It is an arithmetic number, because the mean of its divisors is an integer number (19614821107288).

Almost surely, 2^{78459230732731} is an apocalyptic number.

78459230732731 is a deficient number, since it is larger than the sum of its proper divisors (53696421).

78459230732731 is a wasteful number, since it uses less digits than its factorization.

78459230732731 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 53696420.

The product of its (nonzero) digits is 53343360, while the sum is 61.

The spelling of 78459230732731 in words is "seventy-eight trillion, four hundred fifty-nine billion, two hundred thirty million, seven hundred thirty-two thousand, seven hundred thirty-one".