402191091198 has 72 divisors (see below), whose sum is σ = 943815036528. Its totient is φ = 123723190656.

The previous prime is 402191091191. The next prime is 402191091199. The reversal of 402191091198 is 891190191204.

It is a happy number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (402191091191) by changing a digit.

It is a polite number, since it can be written in 35 ways as a sum of consecutive naturals, for example, 16466311 + ... + 16490717.

It is an arithmetic number, because the mean of its divisors is an integer number (13108542174).

Almost surely, 2^402191091198 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 402191091198, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (471907518264).

402191091198 is an abundant number, since it is smaller than the sum of its proper divisors (541623945330).

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

402191091198 is a wasteful number, since it uses less digits than its factorization.

402191091198 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 29858 (or 29842 counting only the distinct ones).

The product of its (nonzero) digits is 46656, while the sum is 45.

The spelling of 402191091198 in words is "four hundred two billion, one hundred ninety-one million, ninety-one thousand, one hundred ninety-eight".