71578045 has 16 divisors (see below), whose sum is σ = 107088768. Its totient is φ = 44619840.

The previous prime is 71578019. The next prime is 71578051. The reversal of 71578045 is 54087517.

It is not a de Polignac number, because 71578045 - 2⁹ = 71577533 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 71577995 and 71578013.

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, 92574 + ... + 93343.

It is an arithmetic number, because the mean of its divisors is an integer number (6693048).

Almost surely, 2^71578045 is an apocalyptic number.

It is an amenable number.

71578045 is a deficient number, since it is larger than the sum of its proper divisors (35510723).

71578045 is a wasteful number, since it uses less digits than its factorization.

71578045 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 185940.

The product of its (nonzero) digits is 39200, while the sum is 37.

The square root of 71578045 is about 8460.3809015907. The cubic root of 71578045 is about 415.2024850176.

The spelling of 71578045 in words is "seventy-one million, five hundred seventy-eight thousand, forty-five".