78263879654 has 8 divisors (see below), whose sum is σ = 117397703160. Its totient is φ = 39131311936.

The previous prime is 78263879641. The next prime is 78263879723. The reversal of 78263879654 is 45697836287.

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

It is a super-2 number, since 2×78263879654² (a number of 23 digits) contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 138539 + ... + 419190.

It is an arithmetic number, because the mean of its divisors is an integer number (14674712895).

Almost surely, 2^78263879654 is an apocalyptic number.

78263879654 is a deficient number, since it is larger than the sum of its proper divisors (39133823506).

78263879654 is a wasteful number, since it uses less digits than its factorization.

78263879654 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 627894.

The product of its digits is 121927680, while the sum is 65.

The spelling of 78263879654 in words is "seventy-eight billion, two hundred sixty-three million, eight hundred seventy-nine thousand, six hundred fifty-four".