81207416 has 16 divisors (see below), whose sum is σ = 152806200. Its totient is φ = 40459104.

The previous prime is 81207407. The next prime is 81207431. The reversal of 81207416 is 61470218.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 15671 + ... + 20198.

Almost surely, 2^81207416 is an apocalyptic number.

It is an amenable number.

81207416 is a deficient number, since it is larger than the sum of its proper divisors (71598784).

81207416 is a wasteful number, since it uses less digits than its factorization.

81207416 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 36158 (or 36154 counting only the distinct ones).

The product of its (nonzero) digits is 2688, while the sum is 29.

The square root of 81207416 is about 9011.5157437581. The cubic root of 81207416 is about 433.0438719066.

The spelling of 81207416 in words is "eighty-one million, two hundred seven thousand, four hundred sixteen".