71776540641 has 8 divisors (see below), whose sum is σ = 103063750720. Its totient is φ = 44170178832.

The previous prime is 71776540639. The next prime is 71776540643. The reversal of 71776540641 is 14604567717.

It is an interprime number because it is at equal distance from previous prime (71776540639) and next prime (71776540643).

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

It is not a de Polignac number, because 71776540641 - 2¹ = 71776540639 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (71776540643) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 920212021 + ... + 920212098.

It is an arithmetic number, because the mean of its divisors is an integer number (12882968840).

Almost surely, 2^71776540641 is an apocalyptic number.

It is an amenable number.

71776540641 is a deficient number, since it is larger than the sum of its proper divisors (31287210079).

71776540641 is a wasteful number, since it uses less digits than its factorization.

71776540641 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1840424135.

The product of its (nonzero) digits is 987840, while the sum is 48.

The spelling of 71776540641 in words is "seventy-one billion, seven hundred seventy-six million, five hundred forty thousand, six hundred forty-one".