43640506581492 has 24 divisors (see below), whose sum is σ = 101830540262976. Its totient is φ = 14546451016768.

The previous prime is 43640506581491. The next prime is 43640506581499. The reversal of 43640506581492 is 29418560504634.

It is a happy number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (43640506581491) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 47590713 + ... + 48499040.

It is an arithmetic number, because the mean of its divisors is an integer number (4242939177624).

Almost surely, 2^{43640506581492} is an apocalyptic number.

It is an amenable number.

43640506581492 is an abundant number, since it is smaller than the sum of its proper divisors (58190033681484).

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

43640506581492 is a wasteful number, since it uses less digits than its factorization.

43640506581492 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 96127607 (or 96127605 counting only the distinct ones).

The product of its (nonzero) digits is 24883200, while the sum is 57.

The spelling of 43640506581492 in words is "forty-three trillion, six hundred forty billion, five hundred six million, five hundred eighty-one thousand, four hundred ninety-two".