71375255639 has 4 divisors (see below), whose sum is σ = 71502032856. Its totient is φ = 71248478424.

The previous prime is 71375255629. The next prime is 71375255689. The reversal of 71375255639 is 93655257317.

It is a happy number.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-71375255639 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (71375255629) 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, 63387764 + ... + 63388889.

It is an arithmetic number, because the mean of its divisors is an integer number (17875508214).

Almost surely, 2^71375255639 is an apocalyptic number.

71375255639 is a deficient number, since it is larger than the sum of its proper divisors (126777217).

71375255639 is a wasteful number, since it uses less digits than its factorization.

71375255639 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 126777216.

The product of its digits is 5953500, while the sum is 53.

The spelling of 71375255639 in words is "seventy-one billion, three hundred seventy-five million, two hundred fifty-five thousand, six hundred thirty-nine".