78472338776471 has 2 divisors, whose sum is σ = 78472338776472. Its totient is φ = 78472338776470.

The previous prime is 78472338776467. The next prime is 78472338776563. The reversal of 78472338776471 is 17467783327487.

It is a happy number.

It is a weak prime.

It is an emirp because it is prime and its reverse (17467783327487) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 78472338776471 - 2² = 78472338776467 is a prime.

It is a super-3 number, since 3×78472338776471³ (a number of 43 digits) contains 333 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (78472388776471) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 39236169388235 + 39236169388236.

It is an arithmetic number, because the mean of its divisors is an integer number (39236169388236).

Almost surely, 2^{78472338776471} is an apocalyptic number.

78472338776471 is a deficient number, since it is larger than the sum of its proper divisors (1).

78472338776471 is an equidigital number, since it uses as much as digits as its factorization.

78472338776471 is an evil number, because the sum of its binary digits is even.

The product of its digits is 1858719744, while the sum is 74.

The spelling of 78472338776471 in words is "seventy-eight trillion, four hundred seventy-two billion, three hundred thirty-eight million, seven hundred seventy-six thousand, four hundred seventy-one".