71521750475 has 24 divisors (see below), whose sum is σ = 105763349760. Its totient is φ = 46911157920.

The previous prime is 71521750459. The next prime is 71521750477. The reversal of 71521750475 is 57405712517.

It is not a de Polignac number, because 71521750475 - 2⁴ = 71521750459 is a prime.

It is not an unprimeable number, because it can be changed into a prime (71521750477) 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, 8880665 + ... + 8888714.

It is an arithmetic number, because the mean of its divisors is an integer number (4406806240).

Almost surely, 2^71521750475 is an apocalyptic number.

71521750475 is a deficient number, since it is larger than the sum of its proper divisors (34241599285).

71521750475 is a wasteful number, since it uses less digits than its factorization.

71521750475 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 17769419 (or 17769414 counting only the distinct ones).

The product of its (nonzero) digits is 343000, while the sum is 44.

The spelling of 71521750475 in words is "seventy-one billion, five hundred twenty-one million, seven hundred fifty thousand, four hundred seventy-five".