71231628075 has 24 divisors (see below), whose sum is σ = 118850094000. Its totient is φ = 37641663360.

The previous prime is 71231628059. The next prime is 71231628077. The reversal of 71231628075 is 57082613217.

It is not a de Polignac number, because 71231628075 - 2⁴ = 71231628059 is a prime.

It is not an unprimeable number, because it can be changed into a prime (71231628077) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 4348500 + ... + 4364849.

It is an arithmetic number, because the mean of its divisors is an integer number (4952087250).

Almost surely, 2^71231628075 is an apocalyptic number.

71231628075 is a gapful number since it is divisible by the number (75) formed by its first and last digit.

71231628075 is a deficient number, since it is larger than the sum of its proper divisors (47618465925).

71231628075 is a wasteful number, since it uses less digits than its factorization.

71231628075 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8713471 (or 8713466 counting only the distinct ones).

The product of its (nonzero) digits is 141120, while the sum is 42.

The spelling of 71231628075 in words is "seventy-one billion, two hundred thirty-one million, six hundred twenty-eight thousand, seventy-five".