78261793830693 has 48 divisors (see below), whose sum is σ = 131822044099200. Its totient is φ = 44262591014400.

The previous prime is 78261793830677. The next prime is 78261793830761. The reversal of 78261793830693 is 39603839716287.

78261793830693 is a `hidden beast` number, since 7 + 82 + 61 + 79 + 38 + 306 + 93 = 666.

It is not a de Polignac number, because 78261793830693 - 2⁴ = 78261793830677 is a prime.

It is a super-2 number, since 2×78261793830693² (a number of 29 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (78261793830643) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 419059968 + ... + 419246681.

It is an arithmetic number, because the mean of its divisors is an integer number (2746292585400).

Almost surely, 2^{78261793830693} is an apocalyptic number.

It is an amenable number.

78261793830693 is a deficient number, since it is larger than the sum of its proper divisors (53560250268507).

78261793830693 is a wasteful number, since it uses less digits than its factorization.

78261793830693 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 838306730 (or 838306727 counting only the distinct ones).

The product of its (nonzero) digits is 493807104, while the sum is 72.

The spelling of 78261793830693 in words is "seventy-eight trillion, two hundred sixty-one billion, seven hundred ninety-three million, eight hundred thirty thousand, six hundred ninety-three".