71137585940 has 24 divisors (see below), whose sum is σ = 149394565320. Its totient is φ = 28453961088.

The previous prime is 71137585931. The next prime is 71137585963. The reversal of 71137585940 is 4958573117.

It is a happy number.

It can be written as a sum of positive squares in 4 ways, for example, as 11836569616 + 59301016324 = 108796^2 + 243518^2 .

It is a super-2 number, since 2×71137585940² (a number of 23 digits) contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 678566 + ... + 776354.

It is an arithmetic number, because the mean of its divisors is an integer number (6224773555).

Almost surely, 2^71137585940 is an apocalyptic number.

It is an amenable number.

71137585940 is an abundant number, since it is smaller than the sum of its proper divisors (78256979380).

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

71137585940 is a wasteful number, since it uses less digits than its factorization.

71137585940 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 134171 (or 134169 counting only the distinct ones).

The product of its (nonzero) digits is 1058400, while the sum is 50.

The spelling of 71137585940 in words is "seventy-one billion, one hundred thirty-seven million, five hundred eighty-five thousand, nine hundred forty".