78795780947 has 8 divisors (see below), whose sum is σ = 85697164560. Its totient is φ = 72014421600.

The previous prime is 78795780913. The next prime is 78795780953. The reversal of 78795780947 is 74908759787.

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 78795780947 - 2⁶ = 78795780883 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (78795780967) 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, 30004697 + ... + 30007322.

It is an arithmetic number, because the mean of its divisors is an integer number (10712145570).

Almost surely, 2^78795780947 is an apocalyptic number.

78795780947 is a deficient number, since it is larger than the sum of its proper divisors (6901383613).

78795780947 is a wasteful number, since it uses less digits than its factorization.

78795780947 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 60012133.

The product of its (nonzero) digits is 248935680, while the sum is 71.

The spelling of 78795780947 in words is "seventy-eight billion, seven hundred ninety-five million, seven hundred eighty thousand, nine hundred forty-seven".