172947780033 has 32 divisors (see below), whose sum is σ = 268672896000. Its totient is φ = 96904506816.

The previous prime is 172947780023. The next prime is 172947780043. The reversal of 172947780033 is 330087749271.

It is a happy number.

It is an interprime number because it is at equal distance from previous prime (172947780023) and next prime (172947780043).

It is not a de Polignac number, because 172947780033 - 2¹⁷ = 172947648961 is a prime.

It is not an unprimeable number, because it can be changed into a prime (172947780013) by changing a digit.

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 31 ways as a sum of consecutive naturals, for example, 1845258 + ... + 1936716.

It is an arithmetic number, because the mean of its divisors is an integer number (8396028000).

Almost surely, 2^172947780033 is an apocalyptic number.

It is an amenable number.

172947780033 is a deficient number, since it is larger than the sum of its proper divisors (95725115967).

172947780033 is a wasteful number, since it uses less digits than its factorization.

172947780033 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 93221.

The product of its (nonzero) digits is 1778112, while the sum is 51.

The spelling of 172947780033 in words is "one hundred seventy-two billion, nine hundred forty-seven million, seven hundred eighty thousand, thirty-three".