401873406187 has 8 divisors (see below), whose sum is σ = 440226472752. Its totient is φ = 363823526400.

The previous prime is 401873406173. The next prime is 401873406217. The reversal of 401873406187 is 781604378104.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 401873406187 - 2¹⁹ = 401872881899 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 401873406187.

It is not an unprimeable number, because it can be changed into a prime (401873406107) 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 7 ways as a sum of consecutive naturals, for example, 75793918 + ... + 75799219.

It is an arithmetic number, because the mean of its divisors is an integer number (55028309094).

Almost surely, 2^401873406187 is an apocalyptic number.

401873406187 is a deficient number, since it is larger than the sum of its proper divisors (38353066565).

401873406187 is a wasteful number, since it uses less digits than its factorization.

401873406187 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 151593389.

The product of its (nonzero) digits is 903168, while the sum is 49.

The spelling of 401873406187 in words is "four hundred one billion, eight hundred seventy-three million, four hundred six thousand, one hundred eighty-seven".