71786618401 has 4 divisors (see below), whose sum is σ = 72108531712. Its totient is φ = 71464705092.

The previous prime is 71786618399. The next prime is 71786618413. The reversal of 71786618401 is 10481668717.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 71786618401 - 2¹ = 71786618399 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (71786618201) by changing a digit.

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, 160956321 + ... + 160956766.

It is an arithmetic number, because the mean of its divisors is an integer number (18027132928).

Almost surely, 2^71786618401 is an apocalyptic number.

It is an amenable number.

71786618401 is a deficient number, since it is larger than the sum of its proper divisors (321913311).

71786618401 is a wasteful number, since it uses less digits than its factorization.

71786618401 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 321913310.

The product of its (nonzero) digits is 451584, while the sum is 49.

The spelling of 71786618401 in words is "seventy-one billion, seven hundred eighty-six million, six hundred eighteen thousand, four hundred one".