401815198326 has 32 divisors (see below), whose sum is σ = 832102788960. Its totient is φ = 129201456384.

The previous prime is 401815198319. The next prime is 401815198373. The reversal of 401815198326 is 623891518104.

It is a happy number.

It is a super-4 number, since 4×401815198326⁴ (a number of 48 digits) contains 4444 as substring. Note that it is a super-d number also for d = 2.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 866215 + ... + 1246578.

It is an arithmetic number, because the mean of its divisors is an integer number (26003212155).

Almost surely, 2^401815198326 is an apocalyptic number.

401815198326 is an abundant number, since it is smaller than the sum of its proper divisors (430287590634).

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

401815198326 is a wasteful number, since it uses less digits than its factorization.

401815198326 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2113920.

The product of its (nonzero) digits is 414720, while the sum is 48.

The spelling of 401815198326 in words is "four hundred one billion, eight hundred fifteen million, one hundred ninety-eight thousand, three hundred twenty-six".