71512807051 has 8 divisors (see below), whose sum is σ = 81928751840. Its totient is φ = 61146819648.

The previous prime is 71512807021. The next prime is 71512807061. The reversal of 71512807051 is 15070821517.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 71512807051 - 2⁹ = 71512806539 is a prime.

It is a super-2 number, since 2×71512807051² (a number of 23 digits) contains 22 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 71512807051.

It is not an unprimeable number, because it can be changed into a prime (71512807021) 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, 12486276 + ... + 12492001.

It is an arithmetic number, because the mean of its divisors is an integer number (10241093980).

Almost surely, 2^71512807051 is an apocalyptic number.

71512807051 is a deficient number, since it is larger than the sum of its proper divisors (10415944789).

71512807051 is a wasteful number, since it uses less digits than its factorization.

71512807051 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 24978693.

The product of its (nonzero) digits is 19600, while the sum is 37.

The spelling of 71512807051 in words is "seventy-one billion, five hundred twelve million, eight hundred seven thousand, fifty-one".