71390163242 has 4 divisors (see below), whose sum is σ = 107085244866. Its totient is φ = 35695081620.

The previous prime is 71390163233. The next prime is 71390163269. The reversal of 71390163242 is 24236109317.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in only one way, i.e., 67980654361 + 3409508881 = 260731^2 + 58391^2 .

It is a junction number, because it is equal to n+sod(n) for n = 71390163196 and 71390163205.

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 as a sum of consecutive naturals, namely, 17847540809 + ... + 17847540812.

Almost surely, 2^71390163242 is an apocalyptic number.

71390163242 is a deficient number, since it is larger than the sum of its proper divisors (35695081624).

71390163242 is a wasteful number, since it uses less digits than its factorization.

71390163242 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 35695081623.

The product of its (nonzero) digits is 54432, while the sum is 38.

The spelling of 71390163242 in words is "seventy-one billion, three hundred ninety million, one hundred sixty-three thousand, two hundred forty-two".