71744745 has 16 divisors (see below), whose sum is σ = 115204032. Its totient is φ = 38126400.

The previous prime is 71744737. The next prime is 71744749. The reversal of 71744745 is 54744717.

It is not a de Polignac number, because 71744745 - 2³ = 71744737 is a prime.

It is not an unprimeable number, because it can be changed into a prime (71744749) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 4206 + ... + 12695.

It is an arithmetic number, because the mean of its divisors is an integer number (7200252).

Almost surely, 2^71744745 is an apocalyptic number.

It is an amenable number.

71744745 is a deficient number, since it is larger than the sum of its proper divisors (43459287).

71744745 is a wasteful number, since it uses less digits than its factorization.

71744745 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 17192.

The product of its digits is 109760, while the sum is 39.

The square root of 71744745 is about 8470.2269745267. The cubic root of 71744745 is about 415.5245604623.

The spelling of 71744745 in words is "seventy-one million, seven hundred forty-four thousand, seven hundred forty-five".