71540646 has 16 divisors (see below), whose sum is σ = 143258544. Its totient is φ = 23817344.

The previous prime is 71540611. The next prime is 71540669. The reversal of 71540646 is 64604517.

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, 1815 + ... + 12098.

It is an arithmetic number, because the mean of its divisors is an integer number (8953659).

Almost surely, 2^71540646 is an apocalyptic number.

71540646 is an abundant number, since it is smaller than the sum of its proper divisors (71717898).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

71540646 is a wasteful number, since it uses less digits than its factorization.

71540646 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 14775.

The product of its (nonzero) digits is 20160, while the sum is 33.

The square root of 71540646 is about 8458.1703695303. The cubic root of 71540646 is about 415.1301590086.

The spelling of 71540646 in words is "seventy-one million, five hundred forty thousand, six hundred forty-six".