78766837523 has 8 divisors (see below), whose sum is σ = 86057463216. Its totient is φ = 71497879200.

The previous prime is 78766837519. The next prime is 78766837561. The reversal of 78766837523 is 32573866787.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 78766837523 - 2² = 78766837519 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (78766837423) 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, 5409236 + ... + 5423777.

It is an arithmetic number, because the mean of its divisors is an integer number (10757182902).

Almost surely, 2^78766837523 is an apocalyptic number.

78766837523 is a deficient number, since it is larger than the sum of its proper divisors (7290625693).

78766837523 is a wasteful number, since it uses less digits than its factorization.

78766837523 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10833685.

The product of its digits is 71124480, while the sum is 62.

The spelling of 78766837523 in words is "seventy-eight billion, seven hundred sixty-six million, eight hundred thirty-seven thousand, five hundred twenty-three".