475548550391 has 4 divisors (see below), whose sum is σ = 475607610792. Its totient is φ = 475489489992.

The previous prime is 475548550369. The next prime is 475548550403. The reversal of 475548550391 is 193055845574.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 475548550391 - 2¹⁴ = 475548534007 is a prime.

It is a super-2 number, since 2×475548550391² (a number of 24 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (475548550331) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 29518121 + ... + 29534226.

It is an arithmetic number, because the mean of its divisors is an integer number (118901902698).

Almost surely, 2^475548550391 is an apocalyptic number.

475548550391 is a deficient number, since it is larger than the sum of its proper divisors (59060401).

475548550391 is an equidigital number, since it uses as much as digits as its factorization.

475548550391 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 59060400.

The product of its (nonzero) digits is 15120000, while the sum is 56.

The spelling of 475548550391 in words is "four hundred seventy-five billion, five hundred forty-eight million, five hundred fifty thousand, three hundred ninety-one".