78461731659 has 8 divisors (see below), whose sum is σ = 104857250512. Its totient is φ = 52187016960.

The previous prime is 78461731613. The next prime is 78461731669. The reversal of 78461731659 is 95613716487.

It is a happy number.

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

It is not a de Polignac number, because 78461731659 - 2⁷ = 78461731531 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 78461731599 and 78461731608.

It is not an unprimeable number, because it can be changed into a prime (78461731669) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 30199522 + ... + 30202119.

It is an arithmetic number, because the mean of its divisors is an integer number (13107156314).

Almost surely, 2^78461731659 is an apocalyptic number.

78461731659 is a deficient number, since it is larger than the sum of its proper divisors (26395518853).

78461731659 is a wasteful number, since it uses less digits than its factorization.

78461731659 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 60402077.

The product of its digits is 7620480, while the sum is 57.

The spelling of 78461731659 in words is "seventy-eight billion, four hundred sixty-one million, seven hundred thirty-one thousand, six hundred fifty-nine".