71428071429 has 128 divisors (see below), whose sum is σ = 133236633600. Its totient is φ = 37187631360.

The previous prime is 71428071409. The next prime is 71428071467. The reversal of 71428071429 is 92417082417.

71428071429 is a `hidden beast` number, since 7 + 142 + 80 + 7 + 1 + 429 = 666.

It is not a de Polignac number, because 71428071429 - 2¹⁹ = 71427547141 is a prime.

It is a super-2 number, since 2×71428071429² (a number of 23 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (71428071409) by changing a digit.

It is a Kaprekar number, because its square (5101969388066326102041) can be partitioned into two parts whose sum is 71428071429.

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 127 ways as a sum of consecutive naturals, for example, 3274842 + ... + 3296580.

It is an arithmetic number, because the mean of its divisors is an integer number (1040911200).

Almost surely, 2^71428071429 is an apocalyptic number.

71428071429 is the 142857-th nonagonal number.

It is an amenable number.

71428071429 is a deficient number, since it is larger than the sum of its proper divisors (61808562171).

71428071429 is a wasteful number, since it uses less digits than its factorization.

71428071429 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 21832 (or 21826 counting only the distinct ones).

The product of its (nonzero) digits is 225792, while the sum is 45.

The spelling of 71428071429 in words is "seventy-one billion, four hundred twenty-eight million, seventy-one thousand, four hundred twenty-nine".