71537502768 has 80 divisors (see below), whose sum is σ = 186317003520. Its totient is φ = 23651561728.

The previous prime is 71537502719. The next prime is 71537502779. The reversal of 71537502768 is 86720573517.

It is a super-2 number, since 2×71537502768² (a number of 23 digits) contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 71537502768.

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 in 15 ways as a sum of consecutive naturals, for example, 2918821 + ... + 2943227.

It is an arithmetic number, because the mean of its divisors is an integer number (2328962544).

Almost surely, 2^71537502768 is an apocalyptic number.

It is an amenable number.

71537502768 is an abundant number, since it is smaller than the sum of its proper divisors (114779500752).

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

71537502768 is a wasteful number, since it uses less digits than its factorization.

71537502768 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 24914 (or 24908 counting only the distinct ones).

The product of its (nonzero) digits is 2469600, while the sum is 51.

The spelling of 71537502768 in words is "seventy-one billion, five hundred thirty-seven million, five hundred two thousand, seven hundred sixty-eight".