40981077440 has 112 divisors (see below), whose sum is σ = 100909185024. Its totient is φ = 15836083200.

The previous prime is 40981077437. The next prime is 40981077457. The reversal of 40981077440 is 4477018904.

It is a junction number, because it is equal to n+sod(n) for n = 40981077391 and 40981077400.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 6256247 + ... + 6262793.

Almost surely, 2^40981077440 is an apocalyptic number.

40981077440 is a gapful number since it is divisible by the number (40) 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 40981077440, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (50454592512).

40981077440 is an abundant number, since it is smaller than the sum of its proper divisors (59928107584).

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

40981077440 is a wasteful number, since it uses less digits than its factorization.

40981077440 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7226 (or 7216 counting only the distinct ones).

The product of its (nonzero) digits is 225792, while the sum is 44.

The spelling of 40981077440 in words is "forty billion, nine hundred eighty-one million, seventy-seven thousand, four hundred forty".