71677845 has 16 divisors (see below), whose sum is σ = 127427520. Its totient is φ = 38228112.

The previous prime is 71677817. The next prime is 71677849. The reversal of 71677845 is 54877617.

It is not a de Polignac number, because 71677845 - 2⁵ = 71677813 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (45).

It is a self number, because there is not a number n which added to its sum of digits gives 71677845.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (71677849) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 265339 + ... + 265608.

It is an arithmetic number, because the mean of its divisors is an integer number (7964220).

Almost surely, 2^71677845 is an apocalyptic number.

It is an amenable number.

71677845 is a deficient number, since it is larger than the sum of its proper divisors (55749675).

71677845 is a wasteful number, since it uses less digits than its factorization.

71677845 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 530961 (or 530955 counting only the distinct ones).

The product of its digits is 329280, while the sum is 45.

The square root of 71677845 is about 8466.2769267252. The cubic root of 71677845 is about 415.3953652251.

The spelling of 71677845 in words is "seventy-one million, six hundred seventy-seven thousand, eight hundred forty-five".