401644151 has 4 divisors (see below), whose sum is σ = 404202552. Its totient is φ = 399085752.

The previous prime is 401644141. The next prime is 401644157. The reversal of 401644151 is 151446104.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 401644151 - 2²⁶ = 334535287 is a prime.

It is a super-2 number, since 2×401644151² = 322636048065021602, which contains 22 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 401644151.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (401644157) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1278965 + ... + 1279278.

It is an arithmetic number, because the mean of its divisors is an integer number (101050638).

Almost surely, 2^401644151 is an apocalyptic number.

401644151 is a deficient number, since it is larger than the sum of its proper divisors (2558401).

401644151 is a wasteful number, since it uses less digits than its factorization.

401644151 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2558400.

The product of its (nonzero) digits is 1920, while the sum is 26.

The square root of 401644151 is about 20041.0616235767. The cubic root of 401644151 is about 737.8144370576.

The spelling of 401644151 in words is "four hundred one million, six hundred forty-four thousand, one hundred fifty-one".