71121604839 has 16 divisors (see below), whose sum is σ = 95250304512. Its totient is φ = 47203886048.

The previous prime is 71121604817. The next prime is 71121604861. The reversal of 71121604839 is 93840612117.

It is a happy number.

It is an interprime number because it is at equal distance from previous prime (71121604817) and next prime (71121604861).

It is a cyclic number.

It is not a de Polignac number, because 71121604839 - 2⁷ = 71121604711 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 71121604839.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (71121605839) 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, 1239877 + ... + 1295969.

It is an arithmetic number, because the mean of its divisors is an integer number (5953144032).

Almost surely, 2^71121604839 is an apocalyptic number.

71121604839 is a deficient number, since it is larger than the sum of its proper divisors (24128699673).

71121604839 is a wasteful number, since it uses less digits than its factorization.

71121604839 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 57966.

The product of its (nonzero) digits is 72576, while the sum is 42.

The spelling of 71121604839 in words is "seventy-one billion, one hundred twenty-one million, six hundred four thousand, eight hundred thirty-nine".