172816220728415 has 64 divisors (see below), whose sum is σ = 235134443123712. Its totient is φ = 120836355763200.

The previous prime is 172816220728409. The next prime is 172816220728427. The reversal of 172816220728415 is 514827022618271.

It is not a de Polignac number, because 172816220728415 - 2⁸ = 172816220728159 is a prime.

It is a super-2 number, since 2×172816220728415² (a number of 29 digits) contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 102769529 + ... + 104437581.

It is an arithmetic number, because the mean of its divisors is an integer number (3673975673808).

Almost surely, 2^{172816220728415} is an apocalyptic number.

172816220728415 is a deficient number, since it is larger than the sum of its proper divisors (62318222395297).

172816220728415 is a wasteful number, since it uses less digits than its factorization.

172816220728415 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1668800.

The product of its (nonzero) digits is 6021120, while the sum is 56.

The spelling of 172816220728415 in words is "one hundred seventy-two trillion, eight hundred sixteen billion, two hundred twenty million, seven hundred twenty-eight thousand, four hundred fifteen".