71326671051621 has 32 divisors (see below), whose sum is σ = 97772033871360. Its totient is φ = 46234072482624.

The previous prime is 71326671051589. The next prime is 71326671051661. The reversal of 71326671051621 is 12615017662317.

It is not a de Polignac number, because 71326671051621 - 2⁵ = 71326671051589 is a prime.

It is a super-2 number, since 2×71326671051621² (a number of 29 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (71326671051661) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 5027610 + ... + 12958788.

It is an arithmetic number, because the mean of its divisors is an integer number (3055376058480).

Almost surely, 2^{71326671051621} is an apocalyptic number.

It is an amenable number.

71326671051621 is a deficient number, since it is larger than the sum of its proper divisors (26445362819739).

71326671051621 is a wasteful number, since it uses less digits than its factorization.

71326671051621 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7931745.

The product of its (nonzero) digits is 635040, while the sum is 48.

The spelling of 71326671051621 in words is "seventy-one trillion, three hundred twenty-six billion, six hundred seventy-one million, fifty-one thousand, six hundred twenty-one".