71111501712 has 60 divisors (see below), whose sum is σ = 199031649180. Its totient is φ = 23701665024.

The previous prime is 71111501707. The next prime is 71111501731. The reversal of 71111501712 is 21710511117.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 50554824336 + 20556677376 = 224844^2 + 143376^2 .

It is a super-3 number, since 3×71111501712³ (a number of 34 digits) contains 333 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 2653114 + ... + 2679782.

It is an arithmetic number, because the mean of its divisors is an integer number (3317194153).

Almost surely, 2^71111501712 is an apocalyptic number.

71111501712 is a gapful number since it is divisible by the number (72) formed by its first and last digit.

It is an amenable number.

71111501712 is an abundant number, since it is smaller than the sum of its proper divisors (127920147468).

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

71111501712 is a wasteful number, since it uses less digits than its factorization.

71111501712 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 45200 (or 45191 counting only the distinct ones).

The product of its (nonzero) digits is 490, while the sum is 27.

The spelling of 71111501712 in words is "seventy-one billion, one hundred eleven million, five hundred one thousand, seven hundred twelve".