172646204955 has 64 divisors (see below), whose sum is σ = 339746254848. Its totient is φ = 73063618560.

The previous prime is 172646204953. The next prime is 172646204959. The reversal of 172646204955 is 559402646271.

It is a happy number.

It is not a de Polignac number, because 172646204955 - 2¹ = 172646204953 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (51).

It is a junction number, because it is equal to n+sod(n) for n = 172646204898 and 172646204907.

It is not an unprimeable number, because it can be changed into a prime (172646204953) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 683907 + ... + 901676.

It is an arithmetic number, because the mean of its divisors is an integer number (5308535232).

Almost surely, 2^172646204955 is an apocalyptic number.

172646204955 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

172646204955 is a deficient number, since it is larger than the sum of its proper divisors (167100049893).

172646204955 is a wasteful number, since it uses less digits than its factorization.

172646204955 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1585676.

The product of its (nonzero) digits is 3628800, while the sum is 51.

The spelling of 172646204955 in words is "one hundred seventy-two billion, six hundred forty-six million, two hundred four thousand, nine hundred fifty-five".