43925257640 has 32 divisors (see below), whose sum is σ = 107816542560. Its totient is φ = 15972820800.

The previous prime is 43925257639. The next prime is 43925257693. The reversal of 43925257640 is 4675252934.

It is a Smith number, since the sum of its digits (47) coincides with the sum of the digits of its prime factors.

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, 49914626 + ... + 49915505.

It is an arithmetic number, because the mean of its divisors is an integer number (3369266955).

Almost surely, 2^43925257640 is an apocalyptic number.

43925257640 is a gapful number since it is divisible by the number (40) formed by its first and last digit.

It is an amenable number.

43925257640 is an abundant number, since it is smaller than the sum of its proper divisors (63891284920).

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

43925257640 is a wasteful number, since it uses less digits than its factorization.

43925257640 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 99830153 (or 99830149 counting only the distinct ones).

The product of its (nonzero) digits is 1814400, while the sum is 47.

The spelling of 43925257640 in words is "forty-three billion, nine hundred twenty-five million, two hundred fifty-seven thousand, six hundred forty".