78316142131 has 4 divisors (see below), whose sum is σ = 78317233632. Its totient is φ = 78315050632.

The previous prime is 78316142057. The next prime is 78316142141. The reversal of 78316142131 is 13124161387.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 13124161387 = 211 ⋅62199817.

It is a cyclic number.

It is not a de Polignac number, because 78316142131 - 2¹¹ = 78316140083 is a prime.

It is a super-2 number, since 2×78316142131² (a number of 23 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (78316142141) by changing a digit.

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, 429931 + ... + 584356.

It is an arithmetic number, because the mean of its divisors is an integer number (19579308408).

Almost surely, 2^78316142131 is an apocalyptic number.

78316142131 is a deficient number, since it is larger than the sum of its proper divisors (1091501).

78316142131 is a wasteful number, since it uses less digits than its factorization.

78316142131 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1091500.

The product of its digits is 24192, while the sum is 37.

The spelling of 78316142131 in words is "seventy-eight billion, three hundred sixteen million, one hundred forty-two thousand, one hundred thirty-one".