40891797936 has 480 divisors, whose sum is σ = 134641668096. Its totient is φ = 11467008000.

The previous prime is 40891797917. The next prime is 40891797937. The reversal of 40891797936 is 63979719804.

40891797936 is a `hidden beast` number, since 408 + 91 + 79 + 79 + 3 + 6 = 666.

It is not an unprimeable number, because it can be changed into a prime (40891797937) by changing a digit.

It is a polite number, since it can be written in 95 ways as a sum of consecutive naturals, for example, 128996050 + ... + 128996366.

Almost surely, 2^40891797936 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 40891797936, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (67320834048).

40891797936 is an abundant number, since it is smaller than the sum of its proper divisors (93749870160).

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

40891797936 is a wasteful number, since it uses less digits than its factorization.

40891797936 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 481 (or 472 counting only the distinct ones).

The product of its (nonzero) digits is 20575296, while the sum is 63.

The spelling of 40891797936 in words is "forty billion, eight hundred ninety-one million, seven hundred ninety-seven thousand, nine hundred thirty-six".