71506391322 has 16 divisors (see below), whose sum is σ = 143134925472. Its totient is φ = 23815106640.

The previous prime is 71506391293. The next prime is 71506391329. The reversal of 71506391322 is 22319360517.

It is a happy number.

It is a super-2 number, since 2×71506391322² (a number of 23 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (71506391329) 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, 5081673 + ... + 5095724.

It is an arithmetic number, because the mean of its divisors is an integer number (8945932842).

Almost surely, 2^71506391322 is an apocalyptic number.

71506391322 is an abundant number, since it is smaller than the sum of its proper divisors (71628534150).

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

71506391322 is a wasteful number, since it uses less digits than its factorization.

71506391322 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10178573.

The product of its (nonzero) digits is 68040, while the sum is 39.

The spelling of 71506391322 in words is "seventy-one billion, five hundred six million, three hundred ninety-one thousand, three hundred twenty-two".