78542981471 has 16 divisors (see below), whose sum is σ = 81589592064. Its totient is φ = 75549275424.

The previous prime is 78542981437. The next prime is 78542981501. The reversal of 78542981471 is 17418924587.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-78542981471 is a prime.

It is a super-3 number, since 3×78542981471³ (a number of 34 digits) contains 333 as substring.

It is a Smith number, since the sum of its digits (56) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (78542981431) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1300286 + ... + 1359348.

It is an arithmetic number, because the mean of its divisors is an integer number (5099349504).

Almost surely, 2^78542981471 is an apocalyptic number.

78542981471 is a deficient number, since it is larger than the sum of its proper divisors (3046610593).

78542981471 is a wasteful number, since it uses less digits than its factorization.

78542981471 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 59510.

The product of its digits is 4515840, while the sum is 56.

The spelling of 78542981471 in words is "seventy-eight billion, five hundred forty-two million, nine hundred eighty-one thousand, four hundred seventy-one".