40281438892640 has 48 divisors (see below), whose sum is σ = 103816253877840. Its totient is φ = 14647795960320.

The previous prime is 40281438892613. The next prime is 40281438892657. The reversal of 40281438892640 is 4629883418204.

It is a super-2 number, since 2×40281438892640² (a number of 28 digits) contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 40281438892640.

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, 11443588835 + ... + 11443592354.

It is an arithmetic number, because the mean of its divisors is an integer number (2162838622455).

Almost surely, 2^{40281438892640} is an apocalyptic number.

40281438892640 is a gapful number since it is divisible by the number (40) formed by its first and last digit.

It is an amenable number.

40281438892640 is an abundant number, since it is smaller than the sum of its proper divisors (63534814985200).

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

40281438892640 is a wasteful number, since it uses less digits than its factorization.

40281438892640 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 22887181215 (or 22887181207 counting only the distinct ones).

The product of its (nonzero) digits is 21233664, while the sum is 59.

The spelling of 40281438892640 in words is "forty trillion, two hundred eighty-one billion, four hundred thirty-eight million, eight hundred ninety-two thousand, six hundred forty".