401647680000 has 1600 divisors, whose sum is σ = 1764110304000. Its totient is φ = 88252416000.

The previous prime is 401647679999. The next prime is 401647680013. The reversal of 401647680000 is 86746104.

401647680000 is a `hidden beast` number, since 4 + 0 + 1 + 647 + 6 + 8 + 0 + 0 + 0 + 0 = 666.

It is a tau number, because it is divible by the number of its divisors (1600).

It is a super-2 number, since 2×401647680000² (a number of 24 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 159 ways as a sum of consecutive naturals, for example, 1753919886 + ... + 1753920114.

It is an arithmetic number, because the mean of its divisors is an integer number (1102568940).

Almost surely, 2^401647680000 is an apocalyptic number.

401647680000 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 401647680000, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (882055152000).

401647680000 is an abundant number, since it is smaller than the sum of its proper divisors (1362462624000).

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

401647680000 is an equidigital number, since it uses as much as digits as its factorization.

401647680000 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 312 (or 275 counting only the distinct ones).

The product of its (nonzero) digits is 32256, while the sum is 36.

The spelling of 401647680000 in words is "four hundred one billion, six hundred forty-seven million, six hundred eighty thousand".