172048626891 has 24 divisors (see below), whose sum is σ = 262001405120. Its totient is φ = 108493228656.

The previous prime is 172048626833. The next prime is 172048626899. The reversal of 172048626891 is 198626840271.

It is a happy number.

172048626891 is a `hidden beast` number, since 1 + 7 + 2 + 0 + 4 + 8 + 626 + 8 + 9 + 1 = 666.

172048626891 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 172048626891 - 2¹⁴ = 172048610507 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (172048626899) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 672421 + ... + 892326.

Almost surely, 2^172048626891 is an apocalyptic number.

172048626891 is a deficient number, since it is larger than the sum of its proper divisors (89952778229).

172048626891 is a wasteful number, since it uses less digits than its factorization.

172048626891 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1565415 (or 1565412 counting only the distinct ones).

The product of its (nonzero) digits is 2322432, while the sum is 54.

The spelling of 172048626891 in words is "one hundred seventy-two billion, forty-eight million, six hundred twenty-six thousand, eight hundred ninety-one".