71335075428 has 18 divisors (see below), whose sum is σ = 180319218534. Its totient is φ = 23778358464.

The previous prime is 71335075421. The next prime is 71335075439. The reversal of 71335075428 is 82457053317.

71335075428 is a `hidden beast` number, since 7 + 133 + 507 + 5 + 4 + 2 + 8 = 666.

It can be written as a sum of positive squares in only one way, i.e., 70866699264 + 468376164 = 266208^2 + 21642^2 .

It is a tau number, because it is divible by the number of its divisors (18).

It is not an unprimeable number, because it can be changed into a prime (71335075421) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 990764901 + ... + 990764972.

It is an arithmetic number, because the mean of its divisors is an integer number (10017734363).

Almost surely, 2^71335075428 is an apocalyptic number.

It is an amenable number.

71335075428 is an abundant number, since it is smaller than the sum of its proper divisors (108984143106).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

71335075428 is a wasteful number, since it uses less digits than its factorization.

71335075428 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1981529883 (or 1981529878 counting only the distinct ones).

The product of its (nonzero) digits is 705600, while the sum is 45.

The spelling of 71335075428 in words is "seventy-one billion, three hundred thirty-five million, seventy-five thousand, four hundred twenty-eight".