72203444775 has 72 divisors (see below), whose sum is σ = 161235644544. Its totient is φ = 30006619200.

The previous prime is 72203444759. The next prime is 72203444813. The reversal of 72203444775 is 57744430227.

It is not a de Polignac number, because 72203444775 - 2⁴ = 72203444759 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (45).

It is a self number, because there is not a number n which added to its sum of digits gives 72203444775.

It is a congruent number.

It is an unprimeable number.

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 71 ways as a sum of consecutive naturals, for example, 2066469 + ... + 2101118.

It is an arithmetic number, because the mean of its divisors is an integer number (2239383952).

Almost surely, 2^72203444775 is an apocalyptic number.

72203444775 is a gapful number since it is divisible by the number (75) formed by its first and last digit.

72203444775 is an abundant number, since it is smaller than the sum of its proper divisors (89032199769).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

72203444775 is a wasteful number, since it uses less digits than its factorization.

72203444775 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4167621 (or 4167613 counting only the distinct ones).

The product of its (nonzero) digits is 1317120, while the sum is 45.

The spelling of 72203444775 in words is "seventy-two billion, two hundred three million, four hundred forty-four thousand, seven hundred seventy-five".