72771161443 has 4 divisors (see below), whose sum is σ = 75935125008. Its totient is φ = 69607197880.

The previous prime is 72771161429. The next prime is 72771161459. The reversal of 72771161443 is 34416117727.

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 72771161443 - 2¹³ = 72771153251 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 72771161443.

It is not an unprimeable number, because it can be changed into a prime (72771161483) 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, 1581981748 + ... + 1581981793.

It is an arithmetic number, because the mean of its divisors is an integer number (18983781252).

Almost surely, 2^72771161443 is an apocalyptic number.

72771161443 is a deficient number, since it is larger than the sum of its proper divisors (3163963565).

72771161443 is a wasteful number, since it uses less digits than its factorization.

72771161443 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3163963564.

The product of its digits is 197568, while the sum is 43.

The spelling of 72771161443 in words is "seventy-two billion, seven hundred seventy-one million, one hundred sixty-one thousand, four hundred forty-three".