401326251620 has 48 divisors (see below), whose sum is σ = 963478564608. Its totient is φ = 137555349120.

The previous prime is 401326251617. The next prime is 401326251629. The reversal of 401326251620 is 26152623104.

It is a super-2 number, since 2×401326251620² (a number of 24 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (401326251629) 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, 19754 + ... + 896126.

It is an arithmetic number, because the mean of its divisors is an integer number (20072470096).

Almost surely, 2^401326251620 is an apocalyptic number.

It is an amenable number.

401326251620 is an abundant number, since it is smaller than the sum of its proper divisors (562152312988).

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

401326251620 is a wasteful number, since it uses less digits than its factorization.

401326251620 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 879660 (or 879658 counting only the distinct ones).

The product of its (nonzero) digits is 17280, while the sum is 32.

Adding to 401326251620 its reverse (26152623104), we get a palindrome (427478874724).

The spelling of 401326251620 in words is "four hundred one billion, three hundred twenty-six million, two hundred fifty-one thousand, six hundred twenty".