40194981216 has 480 divisors, whose sum is σ = 131949373248. Its totient is φ = 11925688320.

The previous prime is 40194981193. The next prime is 40194981223. The reversal of 40194981216 is 61218949104.

It is a happy number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 79 ways as a sum of consecutive naturals, for example, 126797890 + ... + 126798206.

Almost surely, 2^40194981216 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 40194981216, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (65974686624).

40194981216 is an abundant number, since it is smaller than the sum of its proper divisors (91754392032).

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

40194981216 is a wasteful number, since it uses less digits than its factorization.

40194981216 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 476 (or 459 counting only the distinct ones).

The product of its (nonzero) digits is 124416, while the sum is 45.

The spelling of 40194981216 in words is "forty billion, one hundred ninety-four million, nine hundred eighty-one thousand, two hundred sixteen".