71445455 has 4 divisors (see below), whose sum is σ = 85734552. Its totient is φ = 57156360.

The previous prime is 71445443. The next prime is 71445469. The reversal of 71445455 is 55454417.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 55454417 = 347 ⋅159811.

It is not a de Polignac number, because 71445455 - 2¹⁸ = 71183311 is a prime.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 7144541 + ... + 7144550.

It is an arithmetic number, because the mean of its divisors is an integer number (21433638).

Almost surely, 2^71445455 is an apocalyptic number.

71445455 is a deficient number, since it is larger than the sum of its proper divisors (14289097).

71445455 is a wasteful number, since it uses less digits than its factorization.

71445455 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 14289096.

The product of its digits is 56000, while the sum is 35.

The square root of 71445455 is about 8452.5413338238. The cubic root of 71445455 is about 414.9459551240.

The spelling of 71445455 in words is "seventy-one million, four hundred forty-five thousand, four hundred fifty-five".