78882278407 has 4 divisors (see below), whose sum is σ = 79484433336. Its totient is φ = 78280123480.

The previous prime is 78882278401. The next prime is 78882278411. The reversal of 78882278407 is 70487228887.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 70487228887 = 31 ⋅2273781577.

It is a cyclic number.

It is not a de Polignac number, because 78882278407 - 2¹¹ = 78882276359 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (78882278401) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 301077268 + ... + 301077529.

It is an arithmetic number, because the mean of its divisors is an integer number (19871108334).

Almost surely, 2^78882278407 is an apocalyptic number.

78882278407 is a deficient number, since it is larger than the sum of its proper divisors (602154929).

78882278407 is a wasteful number, since it uses less digits than its factorization.

78882278407 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 602154928.

The product of its (nonzero) digits is 22478848, while the sum is 61.

The spelling of 78882278407 in words is "seventy-eight billion, eight hundred eighty-two million, two hundred seventy-eight thousand, four hundred seven".