78472338784556 has 24 divisors (see below), whose sum is σ = 144557051538480. Its totient is φ = 37170402437952.

The previous prime is 78472338784549. The next prime is 78472338784639. The reversal of 78472338784556 is 65548783327487.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 5755295 + ... + 13786518.

It is an arithmetic number, because the mean of its divisors is an integer number (6023210480770).

Almost surely, 2^{78472338784556} is an apocalyptic number.

78472338784556 is a gapful number since it is divisible by the number (76) formed by its first and last digit.

It is an amenable number.

78472338784556 is a deficient number, since it is larger than the sum of its proper divisors (66084712753924).

78472338784556 is a wasteful number, since it uses less digits than its factorization.

78472338784556 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 19594673 (or 19594671 counting only the distinct ones).

The product of its digits is 7586611200, while the sum is 77.

The spelling of 78472338784556 in words is "seventy-eight trillion, four hundred seventy-two billion, three hundred thirty-eight million, seven hundred eighty-four thousand, five hundred fifty-six".