78754493729 has 8 divisors (see below), whose sum is σ = 82193847360. Its totient is φ = 75316410576.

The previous prime is 78754493723. The next prime is 78754493737. The reversal of 78754493729 is 92739445787.

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 78754493729 - 2⁸ = 78754493473 is a prime.

It is a super-2 number, since 2×78754493729² (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 (78754493723) 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, 189839 + ... + 439940.

It is an arithmetic number, because the mean of its divisors is an integer number (10274230920).

Almost surely, 2^78754493729 is an apocalyptic number.

It is an amenable number.

78754493729 is a deficient number, since it is larger than the sum of its proper divisors (3439353631).

78754493729 is a wasteful number, since it uses less digits than its factorization.

78754493729 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 635239.

The product of its digits is 106686720, while the sum is 65.

The spelling of 78754493729 in words is "seventy-eight billion, seven hundred fifty-four million, four hundred ninety-three thousand, seven hundred twenty-nine".