401646988398 has 16 divisors (see below), whose sum is σ = 803832034896. Its totient is φ = 133792653120.

The previous prime is 401646988387. The next prime is 401646988403. The reversal of 401646988398 is 893889646104.

It is a super-2 number, since 2×401646988398² (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 7 ways as a sum of consecutive naturals, for example, 22409383 + ... + 22427298.

It is an arithmetic number, because the mean of its divisors is an integer number (50239502181).

Almost surely, 2^401646988398 is an apocalyptic number.

401646988398 is an abundant number, since it is smaller than the sum of its proper divisors (402185046498).

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

401646988398 is a wasteful number, since it uses less digits than its factorization.

401646988398 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 44838179.

The product of its (nonzero) digits is 71663616, while the sum is 66.

The spelling of 401646988398 in words is "four hundred one billion, six hundred forty-six million, nine hundred eighty-eight thousand, three hundred ninety-eight".