42655621504 has 32 divisors (see below), whose sum is σ = 86053687200. Its totient is φ = 21057833472.

The previous prime is 42655621501. The next prime is 42655621507. The reversal of 42655621504 is 40512655624.

It is a happy number.

It is an interprime number because it is at equal distance from previous prime (42655621501) and next prime (42655621507).

It is a tau number, because it is divible by the number of its divisors (32).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (42655621501) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2099047 + ... + 2119270.

It is an arithmetic number, because the mean of its divisors is an integer number (2689177725).

Almost surely, 2^42655621504 is an apocalyptic number.

It is an amenable number.

42655621504 is an abundant number, since it is smaller than the sum of its proper divisors (43398065696).

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

42655621504 is an equidigital number, since it uses as much as digits as its factorization.

42655621504 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4218410 (or 4218398 counting only the distinct ones).

The product of its (nonzero) digits is 288000, while the sum is 40.

The spelling of 42655621504 in words is "forty-two billion, six hundred fifty-five million, six hundred twenty-one thousand, five hundred four".