401727334866 has 128 divisors (see below), whose sum is σ = 1031684677632. Its totient is φ = 102349440000.

The previous prime is 401727334843. The next prime is 401727334871. The reversal of 401727334866 is 668433727104.

It is a super-2 number, since 2×401727334866² (a number of 24 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (51).

It is an unprimeable number.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 7941 + ... + 896391.

It is an arithmetic number, because the mean of its divisors is an integer number (8060036544).

Almost surely, 2^401727334866 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 401727334866, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (515842338816).

401727334866 is an abundant number, since it is smaller than the sum of its proper divisors (629957342766).

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

401727334866 is a wasteful number, since it uses less digits than its factorization.

401727334866 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 888528.

The product of its (nonzero) digits is 4064256, while the sum is 51.

The spelling of 401727334866 in words is "four hundred one billion, seven hundred twenty-seven million, three hundred thirty-four thousand, eight hundred sixty-six".