40454145440 has 96 divisors (see below), whose sum is σ = 98895867840. Its totient is φ = 15627515904.

The previous prime is 40454145427. The next prime is 40454145449. The reversal of 40454145440 is 4454145404.

It is a self number, because there is not a number n which added to its sum of digits gives 40454145440.

It is not an unprimeable number, because it can be changed into a prime (40454145449) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 579287 + ... + 645353.

It is an arithmetic number, because the mean of its divisors is an integer number (1030165290).

Almost surely, 2^40454145440 is an apocalyptic number.

40454145440 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 40454145440, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (49447933920).

40454145440 is an abundant number, since it is smaller than the sum of its proper divisors (58441722400).

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

40454145440 is a wasteful number, since it uses less digits than its factorization.

40454145440 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 66214 (or 66206 counting only the distinct ones).

The product of its (nonzero) digits is 102400, while the sum is 35.

The spelling of 40454145440 in words is "forty billion, four hundred fifty-four million, one hundred forty-five thousand, four hundred forty".