43451505040 has 40 divisors (see below), whose sum is σ = 104508366840. Its totient is φ = 16781270016.

The previous prime is 43451505007. The next prime is 43451505077. The reversal of 43451505040 is 4050515434.

It is a happy number.

It can be written as a sum of positive squares in 4 ways, for example, as 2860538256 + 40590966784 = 53484^2 + 201472^2 .

It is a tau number, because it is divible by the number of its divisors (40).

It is a super-2 number, since 2×43451505040² (a number of 22 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 43451504993 and 43451505011.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 9362229 + ... + 9366868.

It is an arithmetic number, because the mean of its divisors is an integer number (2612709171).

Almost surely, 2^43451505040 is an apocalyptic number.

43451505040 is a gapful number since it is divisible by the number (40) formed by its first and last digit.

It is an amenable number.

43451505040 is an abundant number, since it is smaller than the sum of its proper divisors (61056861800).

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

43451505040 is a wasteful number, since it uses less digits than its factorization.

43451505040 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 18729139 (or 18729133 counting only the distinct ones).

The product of its (nonzero) digits is 24000, while the sum is 31.

The spelling of 43451505040 in words is "forty-three billion, four hundred fifty-one million, five hundred five thousand, forty".