78729672673 has 8 divisors (see below), whose sum is σ = 78790592160. Its totient is φ = 78668781600.

The previous prime is 78729672643. The next prime is 78729672733. The reversal of 78729672673 is 37627692787.

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

It is a cyclic number.

It is not a de Polignac number, because 78729672673 - 2⁵ = 78729672641 is a prime.

It is a super-2 number, since 2×78729672673² (a number of 23 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (78729672643) 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, 10562598 + ... + 10570048.

It is an arithmetic number, because the mean of its divisors is an integer number (9848824020).

Almost surely, 2^78729672673 is an apocalyptic number.

It is an amenable number.

78729672673 is a deficient number, since it is larger than the sum of its proper divisors (60919487).

78729672673 is a wasteful number, since it uses less digits than its factorization.

78729672673 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 14207.

The product of its digits is 74680704, while the sum is 64.

The spelling of 78729672673 in words is "seventy-eight billion, seven hundred twenty-nine million, six hundred seventy-two thousand, six hundred seventy-three".