71544445 has 8 divisors (see below), whose sum is σ = 98118144. Its totient is φ = 49059024.

The previous prime is 71544437. The next prime is 71544469. The reversal of 71544445 is 54444517.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 71544445 - 2³ = 71544437 is a prime.

It is a super-2 number, since 2×71544445² = 10237215220716050, which contains 22 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 71544445.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1022029 + ... + 1022098.

It is an arithmetic number, because the mean of its divisors is an integer number (12264768).

Almost surely, 2^71544445 is an apocalyptic number.

It is an amenable number.

71544445 is a deficient number, since it is larger than the sum of its proper divisors (26573699).

71544445 is a wasteful number, since it uses less digits than its factorization.

71544445 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2044139.

The product of its digits is 44800, while the sum is 34.

The square root of 71544445 is about 8458.3949423044. The cubic root of 71544445 is about 415.1375070532.

The spelling of 71544445 in words is "seventy-one million, five hundred forty-four thousand, four hundred forty-five".