78724172526383 has 4 divisors (see below), whose sum is σ = 78724234590528. Its totient is φ = 78724110462240.

The previous prime is 78724172526379. The next prime is 78724172526421. The reversal of 78724172526383 is 38362527142787.

It is a happy number.

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

It is a cyclic number.

It is not a de Polignac number, because 78724172526383 - 2² = 78724172526379 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 (78724172526983) 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, 29088863 + ... + 31679808.

It is an arithmetic number, because the mean of its divisors is an integer number (19681058647632).

Almost surely, 2^{78724172526383} is an apocalyptic number.

78724172526383 is a deficient number, since it is larger than the sum of its proper divisors (62064145).

78724172526383 is a wasteful number, since it uses less digits than its factorization.

78724172526383 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 62064144.

The product of its digits is 189665280, while the sum is 65.

The spelling of 78724172526383 in words is "seventy-eight trillion, seven hundred twenty-four billion, one hundred seventy-two million, five hundred twenty-six thousand, three hundred eighty-three".