78471655231411 has 4 divisors (see below), whose sum is σ = 84507936403072. Its totient is φ = 72435374059752.

The previous prime is 78471655231397. The next prime is 78471655231429. The reversal of 78471655231411 is 11413255617487.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 78471655231411 - 2¹⁹ = 78471654707123 is a prime.

It is a super-2 number, since 2×78471655231411² (a number of 29 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (78471655231481) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3018140585811 + ... + 3018140585836.

It is an arithmetic number, because the mean of its divisors is an integer number (21126984100768).

Almost surely, 2^{78471655231411} is an apocalyptic number.

78471655231411 is a deficient number, since it is larger than the sum of its proper divisors (6036281171661).

78471655231411 is a wasteful number, since it uses less digits than its factorization.

78471655231411 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6036281171660.

The product of its digits is 5644800, while the sum is 55.

The spelling of 78471655231411 in words is "seventy-eight trillion, four hundred seventy-one billion, six hundred fifty-five million, two hundred thirty-one thousand, four hundred eleven".