7272217171505 has 16 divisors (see below), whose sum is σ = 10252300572864. Its totient is φ = 4882047890880.

The previous prime is 7272217171501. The next prime is 7272217171507. The reversal of 7272217171505 is 5051717122727.

It is not a de Polignac number, because 7272217171505 - 2² = 7272217171501 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 7272217171505.

It is not an unprimeable number, because it can be changed into a prime (7272217171501) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 5085465839 + ... + 5085467268.

It is an arithmetic number, because the mean of its divisors is an integer number (640768785804).

Almost surely, 2^{7272217171505} is an apocalyptic number.

It is an amenable number.

7272217171505 is a deficient number, since it is larger than the sum of its proper divisors (2980083401359).

7272217171505 is a wasteful number, since it uses less digits than its factorization.

7272217171505 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10170933136.

The product of its (nonzero) digits is 480200, while the sum is 47.

The spelling of 7272217171505 in words is "seven trillion, two hundred seventy-two billion, two hundred seventeen million, one hundred seventy-one thousand, five hundred five".