40445404520 has 64 divisors (see below), whose sum is σ = 92833776000. Its totient is φ = 15853297408.

The previous prime is 40445404499. The next prime is 40445404543. The reversal of 40445404520 is 2540454404.

It is a super-3 number, since 3×40445404520³ (a number of 33 digits) contains 333 as substring.

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, 1767311 + ... + 1790049.

It is an arithmetic number, because the mean of its divisors is an integer number (1450527750).

Almost surely, 2^40445404520 is an apocalyptic number.

40445404520 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 40445404520, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (46416888000).

40445404520 is an abundant number, since it is smaller than the sum of its proper divisors (52388371480).

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

40445404520 is a wasteful number, since it uses less digits than its factorization.

40445404520 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 23642 (or 23638 counting only the distinct ones).

The product of its (nonzero) digits is 51200, while the sum is 32.

Adding to 40445404520 its reverse (2540454404), we get a palindrome (42985858924).

The spelling of 40445404520 in words is "forty billion, four hundred forty-five million, four hundred four thousand, five hundred twenty".