40217638572 has 36 divisors (see below), whose sum is σ = 101672101440. Its totient is φ = 13404448992.

The previous prime is 40217638553. The next prime is 40217638579. The reversal of 40217638572 is 27583671204.

40217638572 is a `hidden beast` number, since 4 + 0 + 2 + 1 + 7 + 638 + 5 + 7 + 2 = 666.

40217638572 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a tau number, because it is divible by the number of its divisors (36).

It is not an unprimeable number, because it can be changed into a prime (40217638579) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 314629 + ... + 423587.

It is an arithmetic number, because the mean of its divisors is an integer number (2824225040).

Almost surely, 2^40217638572 is an apocalyptic number.

It is an amenable number.

40217638572 is an abundant number, since it is smaller than the sum of its proper divisors (61454462868).

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

40217638572 is a wasteful number, since it uses less digits than its factorization.

40217638572 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 119222 (or 119217 counting only the distinct ones).

The product of its (nonzero) digits is 564480, while the sum is 45.

The spelling of 40217638572 in words is "forty billion, two hundred seventeen million, six hundred thirty-eight thousand, five hundred seventy-two".