401437891606 has 8 divisors (see below), whose sum is σ = 605309491584. Its totient is φ = 199668061080.

The previous prime is 401437891553. The next prime is 401437891609. The reversal of 401437891606 is 606198734104.

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

It is a super-2 number, since 2×401437891606² (a number of 24 digits) contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 401437891606.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (401437891609) 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 3 ways as a sum of consecutive naturals, for example, 525441885 + ... + 525442648.

It is an arithmetic number, because the mean of its divisors is an integer number (75663686448).

Almost surely, 2^401437891606 is an apocalyptic number.

401437891606 is a deficient number, since it is larger than the sum of its proper divisors (203871599978).

401437891606 is a wasteful number, since it uses less digits than its factorization.

401437891606 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1050884726.

The product of its (nonzero) digits is 870912, while the sum is 49.

The spelling of 401437891606 in words is "four hundred one billion, four hundred thirty-seven million, eight hundred ninety-one thousand, six hundred six".