71563748 has 18 divisors (see below), whose sum is σ = 129413718. Its totient is φ = 34625760.

The previous prime is 71563729. The next prime is 71563753. The reversal of 71563748 is 84736517.

It can be written as a sum of positive squares in only one way, i.e., 71098624 + 465124 = 8432^2 + 682^2 .

It is an unprimeable number.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 5465 + ... + 13152.

It is an arithmetic number, because the mean of its divisors is an integer number (7189651).

Almost surely, 2^71563748 is an apocalyptic number.

It is an amenable number.

71563748 is a deficient number, since it is larger than the sum of its proper divisors (57849970).

71563748 is a wasteful number, since it uses less digits than its factorization.

71563748 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 18683 (or 18650 counting only the distinct ones).

The product of its digits is 141120, while the sum is 41.

The square root of 71563748 is about 8459.5359210775. The cubic root of 71563748 is about 415.1748389929.

The spelling of 71563748 in words is "seventy-one million, five hundred sixty-three thousand, seven hundred forty-eight".