401621611 has 8 divisors (see below), whose sum is σ = 405808704. Its totient is φ = 397442760.

The previous prime is 401621599. The next prime is 401621641. The reversal of 401621611 is 116126104.

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 401621611 - 2⁷ = 401621483 is a prime.

It is a super-2 number, since 2×401621611² = 322599836844470642, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (401621641) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 157416 + ... + 159946.

It is an arithmetic number, because the mean of its divisors is an integer number (50726088).

Almost surely, 2^401621611 is an apocalyptic number.

401621611 is a deficient number, since it is larger than the sum of its proper divisors (4187093).

401621611 is a wasteful number, since it uses less digits than its factorization.

401621611 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4121.

The product of its (nonzero) digits is 288, while the sum is 22.

The square root of 401621611 is about 20040.4992702278. The cubic root of 401621611 is about 737.8006349158.

Adding to 401621611 its reverse (116126104), we get a palindrome (517747715).

The spelling of 401621611 in words is "four hundred one million, six hundred twenty-one thousand, six hundred eleven".