401796664128 has 168 divisors, whose sum is σ = 1157218920000. Its totient is φ = 133289435136.

The previous prime is 401796664069. The next prime is 401796664141. The reversal of 401796664128 is 821466697104.

It is a super-2 number, since 2×401796664128² (a number of 24 digits) contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 121791823 + ... + 121795121.

Almost surely, 2^401796664128 is an apocalyptic number.

401796664128 is a gapful number since it is divisible by the number (48) 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 401796664128, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (578609460000).

401796664128 is an abundant number, since it is smaller than the sum of its proper divisors (755422255872).

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

401796664128 is a wasteful number, since it uses less digits than its factorization.

401796664128 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4269 (or 4256 counting only the distinct ones).

The product of its (nonzero) digits is 3483648, while the sum is 54.

The spelling of 401796664128 in words is "four hundred one billion, seven hundred ninety-six million, six hundred sixty-four thousand, one hundred twenty-eight".