71251520042 has 8 divisors (see below), whose sum is σ = 109362798336. Its totient is φ = 34797253932.

The previous prime is 71251520033. The next prime is 71251520077. The reversal of 71251520042 is 24002515217.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a junction number, because it is equal to n+sod(n) for n = 71251519987 and 71251520014.

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 3 ways as a sum of consecutive naturals, for example, 414252938 + ... + 414253109.

It is an arithmetic number, because the mean of its divisors is an integer number (13670349792).

Almost surely, 2^71251520042 is an apocalyptic number.

71251520042 is a deficient number, since it is larger than the sum of its proper divisors (38111278294).

71251520042 is a wasteful number, since it uses less digits than its factorization.

71251520042 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 828506092.

The product of its (nonzero) digits is 5600, while the sum is 29.

The spelling of 71251520042 in words is "seventy-one billion, two hundred fifty-one million, five hundred twenty thousand, forty-two".