79541852621591 has 4 divisors (see below), whose sum is σ = 80729044451832. Its totient is φ = 78354660791352.

The previous prime is 79541852621557. The next prime is 79541852621599. The reversal of 79541852621591 is 19512625814597.

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

It is a cyclic number.

It is not a de Polignac number, because 79541852621591 - 2²⁶ = 79541785512727 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (79541852621599) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 593595915020 + ... + 593595915153.

It is an arithmetic number, because the mean of its divisors is an integer number (20182261112958).

Almost surely, 2^{79541852621591} is an apocalyptic number.

79541852621591 is a deficient number, since it is larger than the sum of its proper divisors (1187191830241).

79541852621591 is a wasteful number, since it uses less digits than its factorization.

79541852621591 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1187191830240.

The product of its digits is 54432000, while the sum is 65.

The spelling of 79541852621591 in words is "seventy-nine trillion, five hundred forty-one billion, eight hundred fifty-two million, six hundred twenty-one thousand, five hundred ninety-one".