71515500055 has 4 divisors (see below), whose sum is σ = 85818600072. Its totient is φ = 57212400040.

The previous prime is 71515500047. The next prime is 71515500103. The reversal of 71515500055 is 55000551517.

It is a happy number.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 55000551517 = 631 ⋅87164107.

It is not a de Polignac number, because 71515500055 - 2³ = 71515500047 is a prime.

It is a super-2 number, since 2×71515500055² (a number of 23 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 7151550001 + ... + 7151550010.

It is an arithmetic number, because the mean of its divisors is an integer number (21454650018).

Almost surely, 2^71515500055 is an apocalyptic number.

71515500055 is a deficient number, since it is larger than the sum of its proper divisors (14303100017).

71515500055 is a wasteful number, since it uses less digits than its factorization.

71515500055 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 14303100016.

The product of its (nonzero) digits is 21875, while the sum is 34.

The spelling of 71515500055 in words is "seventy-one billion, five hundred fifteen million, five hundred thousand, fifty-five".