42450554421 has 24 divisors (see below), whose sum is σ = 68153900256. Its totient is φ = 25242179040.

The previous prime is 42450554411. The next prime is 42450554441. The reversal of 42450554421 is 12445505424.

42450554421 is a `hidden beast` number, since 42 + 4 + 50 + 5 + 544 + 21 = 666.

It is not a de Polignac number, because 42450554421 - 2⁹ = 42450553909 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (42450554401) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 4039975 + ... + 4050468.

It is an arithmetic number, because the mean of its divisors is an integer number (2839745844).

Almost surely, 2^42450554421 is an apocalyptic number.

It is an amenable number.

42450554421 is a deficient number, since it is larger than the sum of its proper divisors (25703345835).

42450554421 is a wasteful number, since it uses less digits than its factorization.

42450554421 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8090513 (or 8090510 counting only the distinct ones).

The product of its (nonzero) digits is 128000, while the sum is 36.

The spelling of 42450554421 in words is "forty-two billion, four hundred fifty million, five hundred fifty-four thousand, four hundred twenty-one".