71451978562 has 8 divisors (see below), whose sum is σ = 107198464716. Its totient is φ = 35719156992.

The previous prime is 71451978557. The next prime is 71451978613. The reversal of 71451978562 is 26587915417.

It can be written as a sum of positive squares in 2 ways, for example, as 70900245441 + 551733121 = 266271^2 + 23489^2 .

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

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3403063 + ... + 3423994.

Almost surely, 2^71451978562 is an apocalyptic number.

71451978562 is a deficient number, since it is larger than the sum of its proper divisors (35746486154).

71451978562 is a wasteful number, since it uses less digits than its factorization.

71451978562 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6832292.

The product of its digits is 4233600, while the sum is 55.

The spelling of 71451978562 in words is "seventy-one billion, four hundred fifty-one million, nine hundred seventy-eight thousand, five hundred sixty-two".