78328276279 has 4 divisors (see below), whose sum is σ = 85449028680. Its totient is φ = 71207523880.

The previous prime is 78328276249. The next prime is 78328276309. The reversal of 78328276279 is 97267282387.

It is a semiprime because it is the product of two primes.

It is an interprime number because it is at equal distance from previous prime (78328276249) and next prime (78328276309).

It is a cyclic number.

It is not a de Polignac number, because 78328276279 - 2²³ = 78319887671 is a prime.

It is a super-2 number, since 2×78328276279² (a number of 23 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (78328276219) 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, 3560376184 + ... + 3560376205.

It is an arithmetic number, because the mean of its divisors is an integer number (21362257170).

Almost surely, 2^78328276279 is an apocalyptic number.

78328276279 is a deficient number, since it is larger than the sum of its proper divisors (7120752401).

78328276279 is a wasteful number, since it uses less digits than its factorization.

78328276279 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7120752400.

The product of its digits is 28449792, while the sum is 61.

The spelling of 78328276279 in words is "seventy-eight billion, three hundred twenty-eight million, two hundred seventy-six thousand, two hundred seventy-nine".