43609781040 has 80 divisors (see below), whose sum is σ = 154503230208. Its totient is φ = 9967949568.

The previous prime is 43609781011. The next prime is 43609781041. The reversal of 43609781040 is 4018790634.

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

It is a Harshad number since it is a multiple of its sum of digits (42).

It is a junction number, because it is equal to n+sod(n) for n = 43609780983 and 43609781001.

It is not an unprimeable number, because it can be changed into a prime (43609781041) 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, 12977422 + ... + 12980781.

Almost surely, 2^43609781040 is an apocalyptic number.

43609781040 is a gapful number since it is divisible by the number (40) formed by its first and last digit.

It is an amenable number.

43609781040 is an abundant number, since it is smaller than the sum of its proper divisors (110893449168).

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

43609781040 is a wasteful number, since it uses less digits than its factorization.

43609781040 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 25958226 (or 25958220 counting only the distinct ones).

The product of its (nonzero) digits is 145152, while the sum is 42.

The spelling of 43609781040 in words is "forty-three billion, six hundred nine million, seven hundred eighty-one thousand, forty".