71780875139 has 8 divisors (see below), whose sum is σ = 74265402000. Its totient is φ = 69296969952.

The previous prime is 71780875129. The next prime is 71780875147. The reversal of 71780875139 is 93157808717.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a de Polignac number, because none of the positive numbers 2^k-71780875139 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (71780875109) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 85877 + ... + 388505.

It is an arithmetic number, because the mean of its divisors is an integer number (9283175250).

Almost surely, 2^71780875139 is an apocalyptic number.

71780875139 is a deficient number, since it is larger than the sum of its proper divisors (2484526861).

71780875139 is a wasteful number, since it uses less digits than its factorization.

71780875139 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 310837.

The product of its (nonzero) digits is 2963520, while the sum is 56.

The spelling of 71780875139 in words is "seventy-one billion, seven hundred eighty million, eight hundred seventy-five thousand, one hundred thirty-nine".