78108452747 has 8 divisors (see below), whose sum is σ = 84126093744. Its totient is φ = 72092140128.

The previous prime is 78108452713. The next prime is 78108452759. The reversal of 78108452747 is 74725480187.

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 78108452747 - 2⁸ = 78108452491 is a prime.

It is a super-2 number, since 2×78108452747² (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 (78108452797) 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, 208253 + ... + 446750.

It is an arithmetic number, because the mean of its divisors is an integer number (10515761718).

Almost surely, 2^78108452747 is an apocalyptic number.

78108452747 is a deficient number, since it is larger than the sum of its proper divisors (6017640997).

78108452747 is a wasteful number, since it uses less digits than its factorization.

78108452747 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 664189.

The product of its (nonzero) digits is 3512320, while the sum is 53.

The spelling of 78108452747 in words is "seventy-eight billion, one hundred eight million, four hundred fifty-two thousand, seven hundred forty-seven".