401561673360 has 160 divisors (see below), whose sum is σ = 1250010410880. Its totient is φ = 106639110144.

The previous prime is 401561673349. The next prime is 401561673421. The reversal of 401561673360 is 63376165104.

It is a super-2 number, since 2×401561673360² (a number of 24 digits) contains 22 as substring.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 129159486 + ... + 129162594.

It is an arithmetic number, because the mean of its divisors is an integer number (7812565068).

Almost surely, 2^401561673360 is an apocalyptic number.

401561673360 is a gapful number since it is divisible by the number (40) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 401561673360, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (625005205440).

401561673360 is an abundant number, since it is smaller than the sum of its proper divisors (848448737520).

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

401561673360 is a wasteful number, since it uses less digits than its factorization.

401561673360 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5185 (or 5179 counting only the distinct ones).

The product of its (nonzero) digits is 272160, while the sum is 42.

The spelling of 401561673360 in words is "four hundred one billion, five hundred sixty-one million, six hundred seventy-three thousand, three hundred sixty".