72203276655 has 12 divisors (see below), whose sum is σ = 125152346280. Its totient is φ = 38508414192.

The previous prime is 72203276647. The next prime is 72203276659. The reversal of 72203276655 is 55667230227.

It is not a de Polignac number, because 72203276655 - 2³ = 72203276647 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (45), and also a Moran number because the ratio is a prime number: 1604517259 = 72203276655 / (7 + 2 + 2 + 0 + 3 + 2 + 7 + 6 + 6 + 5 + 5).

It is a self number, because there is not a number n which added to its sum of digits gives 72203276655.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (72203276659) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 802258585 + ... + 802258674.

It is an arithmetic number, because the mean of its divisors is an integer number (10429362190).

Almost surely, 2^72203276655 is an apocalyptic number.

72203276655 is a deficient number, since it is larger than the sum of its proper divisors (52949069625).

72203276655 is a wasteful number, since it uses less digits than its factorization.

72203276655 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1604517270 (or 1604517267 counting only the distinct ones).

The product of its (nonzero) digits is 1058400, while the sum is 45.

The spelling of 72203276655 in words is "seventy-two billion, two hundred three million, two hundred seventy-six thousand, six hundred fifty-five".