71630545 has 16 divisors (see below), whose sum is σ = 98386560. Its totient is φ = 49042944.

The previous prime is 71630527. The next prime is 71630563. The reversal of 71630545 is 54503617.

It is an interprime number because it is at equal distance from previous prime (71630527) and next prime (71630563).

It is a cyclic number.

It is not a de Polignac number, because 71630545 - 2⁹ = 71630033 is a prime.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 31414 + ... + 33616.

It is an arithmetic number, because the mean of its divisors is an integer number (6149160).

Almost surely, 2^71630545 is an apocalyptic number.

It is an amenable number.

71630545 is a deficient number, since it is larger than the sum of its proper divisors (26756015).

71630545 is a wasteful number, since it uses less digits than its factorization.

71630545 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3144.

The product of its (nonzero) digits is 12600, while the sum is 31.

The square root of 71630545 is about 8463.4830300533. The cubic root of 71630545 is about 415.3039723906.

The spelling of 71630545 in words is "seventy-one million, six hundred thirty thousand, five hundred forty-five".