71534645 has 16 divisors (see below), whose sum is σ = 105651840. Its totient is φ = 45278784.

The previous prime is 71534599. The next prime is 71534651. The reversal of 71534645 is 54643517.

It is a cyclic number.

It is not a de Polignac number, because 71534645 - 2⁸ = 71534389 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (35).

It is a Curzon number.

It is a congruent number.

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, 78155 + ... + 79064.

It is an arithmetic number, because the mean of its divisors is an integer number (6603240).

Almost surely, 2^71534645 is an apocalyptic number.

It is an amenable number.

71534645 is a deficient number, since it is larger than the sum of its proper divisors (34117195).

71534645 is a wasteful number, since it uses less digits than its factorization.

71534645 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 157244.

The product of its digits is 50400, while the sum is 35.

The square root of 71534645 is about 8457.8156163397. The cubic root of 71534645 is about 415.1185513148.

The spelling of 71534645 in words is "seventy-one million, five hundred thirty-four thousand, six hundred forty-five".