71391690042 has 16 divisors (see below), whose sum is σ = 142786318752. Its totient is φ = 23796740240.

The previous prime is 71391690037. The next prime is 71391690047. The reversal of 71391690042 is 24009619317.

It is an interprime number because it is at equal distance from previous prime (71391690037) and next prime (71391690047).

It is a junction number, because it is equal to n+sod(n) for n = 71391689976 and 71391690003.

It is not an unprimeable number, because it can be changed into a prime (71391690047) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 311893 + ... + 489959.

It is an arithmetic number, because the mean of its divisors is an integer number (8924144922).

Almost surely, 2^71391690042 is an apocalyptic number.

71391690042 is an abundant number, since it is smaller than the sum of its proper divisors (71394628710).

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

71391690042 is a wasteful number, since it uses less digits than its factorization.

71391690042 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 244893.

The product of its (nonzero) digits is 81648, while the sum is 42.

The spelling of 71391690042 in words is "seventy-one billion, three hundred ninety-one million, six hundred ninety thousand, forty-two".