71554133145518 has 4 divisors (see below), whose sum is σ = 107331199718280. Its totient is φ = 35777066572758.

The previous prime is 71554133145479. The next prime is 71554133145589. The reversal of 71554133145518 is 81554133145517.

It is a semiprime because it is the product of two primes.

It is a self number, because there is not a number n which added to its sum of digits gives 71554133145518.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 17888533286378 + ... + 17888533286381.

It is an arithmetic number, because the mean of its divisors is an integer number (26832799929570).

Almost surely, 2^{71554133145518} is an apocalyptic number.

71554133145518 is a deficient number, since it is larger than the sum of its proper divisors (35777066572762).

71554133145518 is a wasteful number, since it uses less digits than its factorization.

71554133145518 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 35777066572761.

The product of its digits is 5040000, while the sum is 53.

Subtracting 71554133145518 from its reverse (81554133145517), we obtain a palindrome (9999999999999).

The spelling of 71554133145518 in words is "seventy-one trillion, five hundred fifty-four billion, one hundred thirty-three million, one hundred forty-five thousand, five hundred eighteen".