401211577164 has 48 divisors (see below), whose sum is σ = 949766501376. Its totient is φ = 131795126400.

The previous prime is 401211577141. The next prime is 401211577223. The reversal of 401211577164 is 461775112104.

It is an unprimeable number.

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 15 ways as a sum of consecutive naturals, for example, 1840189 + ... + 2046635.

It is an arithmetic number, because the mean of its divisors is an integer number (19786802112).

Almost surely, 2^401211577164 is an apocalyptic number.

It is an amenable number.

401211577164 is an abundant number, since it is smaller than the sum of its proper divisors (548554924212).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

401211577164 is a wasteful number, since it uses less digits than its factorization.

401211577164 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 208806 (or 208804 counting only the distinct ones).

The product of its (nonzero) digits is 47040, while the sum is 39.

Adding to 401211577164 its reverse (461775112104), we get a palindrome (862986689268).

The spelling of 401211577164 in words is "four hundred one billion, two hundred eleven million, five hundred seventy-seven thousand, one hundred sixty-four".