71515858652 has 12 divisors (see below), whose sum is σ = 143031717360. Its totient is φ = 30649653696.

The previous prime is 71515858649. The next prime is 71515858669. The reversal of 71515858652 is 25685851517.

It is a happy number.

71515858652 is an admirable number.

It is a super-2 number, since 2×71515858652² (a number of 23 digits) contains 22 as substring.

It is a hoax number, since the sum of its digits (53) coincides with the sum of the digits of its distinct prime factors.

It is a junction number, because it is equal to n+sod(n) for n = 71515858594 and 71515858603.

It is a congruent number.

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 3 ways as a sum of consecutive naturals, for example, 1277068877 + ... + 1277068932.

It is an arithmetic number, because the mean of its divisors is an integer number (11919309780).

Almost surely, 2^71515858652 is an apocalyptic number.

It is an amenable number.

71515858652 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

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

71515858652 is a wasteful number, since it uses less digits than its factorization.

71515858652 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2554137820 (or 2554137818 counting only the distinct ones).

The product of its digits is 3360000, while the sum is 53.

The spelling of 71515858652 in words is "seventy-one billion, five hundred fifteen million, eight hundred fifty-eight thousand, six hundred fifty-two".