43625346640 has 80 divisors (see below), whose sum is σ = 102548115072. Its totient is φ = 17258143232.

The previous prime is 43625346601. The next prime is 43625346641. The reversal of 43625346640 is 4664352634.

It is a happy number.

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

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (43625346641) 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, 5534382 + ... + 5542258.

Almost surely, 2^43625346640 is an apocalyptic number.

43625346640 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 43625346640, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (51274057536).

43625346640 is an abundant number, since it is smaller than the sum of its proper divisors (58922768432).

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

43625346640 is a wasteful number, since it uses less digits than its factorization.

43625346640 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8644 (or 8638 counting only the distinct ones).

The product of its (nonzero) digits is 1244160, while the sum is 43.

The spelling of 43625346640 in words is "forty-three billion, six hundred twenty-five million, three hundred forty-six thousand, six hundred forty".