45431043440 has 80 divisors (see below), whose sum is σ = 112459052160. Its totient is φ = 17008865280.

The previous prime is 45431043439. The next prime is 45431043487. The reversal of 45431043440 is 4434013454.

It is a tau number, because it is divible by the number of its divisors (80).

It is a junction number, because it is equal to n+sod(n) for n = 45431043397 and 45431043406.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 153881 + ... + 338439.

It is an arithmetic number, because the mean of its divisors is an integer number (1405738152).

Almost surely, 2^45431043440 is an apocalyptic number.

45431043440 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 45431043440, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (56229526080).

45431043440 is an abundant number, since it is smaller than the sum of its proper divisors (67028008720).

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

45431043440 is a wasteful number, since it uses less digits than its factorization.

45431043440 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 184770 (or 184764 counting only the distinct ones).

The product of its (nonzero) digits is 46080, while the sum is 32.

Adding to 45431043440 its reverse (4434013454), we get a palindrome (49865056894).

The spelling of 45431043440 in words is "forty-five billion, four hundred thirty-one million, forty-three thousand, four hundred forty".