71591900842 has 24 divisors (see below), whose sum is σ = 134900444448. Its totient is φ = 27892947720.

The previous prime is 71591900837. The next prime is 71591900869. The reversal of 71591900842 is 24800919517.

It is a junction number, because it is equal to n+sod(n) for n = 71591900792 and 71591900801.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 21129328 + ... + 21132715.

It is an arithmetic number, because the mean of its divisors is an integer number (5620851852).

Almost surely, 2^71591900842 is an apocalyptic number.

71591900842 is a deficient number, since it is larger than the sum of its proper divisors (63308543606).

71591900842 is a wasteful number, since it uses less digits than its factorization.

71591900842 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 42262074 (or 42262063 counting only the distinct ones).

The product of its (nonzero) digits is 181440, while the sum is 46.

The spelling of 71591900842 in words is "seventy-one billion, five hundred ninety-one million, nine hundred thousand, eight hundred forty-two".