401636001 has 16 divisors (see below), whose sum is σ = 579239360. Its totient is φ = 246075840.

The previous prime is 401635981. The next prime is 401636021. The reversal of 401636001 is 100636104.

It is an interprime number because it is at equal distance from previous prime (401635981) and next prime (401636021).

It is not a de Polignac number, because 401636001 - 2⁶ = 401635937 is a prime.

It is a super-2 number, since 2×401636001² = 322622954598544002, which contains 22 as substring.

It is a Duffinian number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (401636021) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 13555 + ... + 31416.

It is an arithmetic number, because the mean of its divisors is an integer number (36202460).

Almost surely, 2^401636001 is an apocalyptic number.

It is an amenable number.

401636001 is a deficient number, since it is larger than the sum of its proper divisors (177603359).

401636001 is a wasteful number, since it uses less digits than its factorization.

401636001 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 45216.

The product of its (nonzero) digits is 432, while the sum is 21.

The square root of 401636001 is about 20040.8582900034. The cubic root of 401636001 is about 737.8094465469.

It can be divided in two parts, 40163 and 6001, that added together give a palindrome (46164).

The spelling of 401636001 in words is "four hundred one million, six hundred thirty-six thousand, one".