401361626840 has 32 divisors (see below), whose sum is σ = 911348658000. Its totient is φ = 159071762304.

The previous prime is 401361626761. The next prime is 401361626849. The reversal of 401361626840 is 48626163104.

It is a happy number.

It is a super-2 number, since 2×401361626840² (a number of 24 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (401361626849) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 46023350 + ... + 46032069.

Almost surely, 2^401361626840 is an apocalyptic number.

401361626840 is a gapful number since it is divisible by the number (40) formed by its first and last digit.

It is an amenable number.

401361626840 is an abundant number, since it is smaller than the sum of its proper divisors (509987031160).

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

401361626840 is a wasteful number, since it uses less digits than its factorization.

401361626840 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 92055539 (or 92055535 counting only the distinct ones).

The product of its (nonzero) digits is 165888, while the sum is 41.

Adding to 401361626840 its reverse (48626163104), we get a palindrome (449987789944).

It can be divided in two parts, 401361 and 626840, that added together give a palindrome (1028201).

The spelling of 401361626840 in words is "four hundred one billion, three hundred sixty-one million, six hundred twenty-six thousand, eight hundred forty".