71401021583 has 4 divisors (see below), whose sum is σ = 71666453160. Its totient is φ = 71135590008.

The previous prime is 71401021579. The next prime is 71401021607. The reversal of 71401021583 is 38512010417.

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

It is a cyclic number.

It is not a de Polignac number, because 71401021583 - 2² = 71401021579 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 (71401021553) 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, 132715385 + ... + 132715922.

It is an arithmetic number, because the mean of its divisors is an integer number (17916613290).

Almost surely, 2^71401021583 is an apocalyptic number.

71401021583 is a deficient number, since it is larger than the sum of its proper divisors (265431577).

71401021583 is a wasteful number, since it uses less digits than its factorization.

71401021583 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 265431576.

The product of its (nonzero) digits is 6720, while the sum is 32.

The spelling of 71401021583 in words is "seventy-one billion, four hundred one million, twenty-one thousand, five hundred eighty-three".