42974817640 has 32 divisors (see below), whose sum is σ = 99812482560. Its totient is φ = 16635412800.

The previous prime is 42974817619. The next prime is 42974817649. The reversal of 42974817640 is 4671847924.

42974817640 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not an unprimeable number, because it can be changed into a prime (42974817649) 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, 17327316 + ... + 17329795.

It is an arithmetic number, because the mean of its divisors is an integer number (3119140080).

Almost surely, 2^42974817640 is an apocalyptic number.

42974817640 is a gapful number since it is divisible by the number (40) formed by its first and last digit.

It is an amenable number.

42974817640 is an abundant number, since it is smaller than the sum of its proper divisors (56837664920).

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

42974817640 is a wasteful number, since it uses less digits than its factorization.

42974817640 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 34657153 (or 34657149 counting only the distinct ones).

The product of its (nonzero) digits is 2709504, while the sum is 52.

The spelling of 42974817640 in words is "forty-two billion, nine hundred seventy-four million, eight hundred seventeen thousand, six hundred forty".