42427401645 has 16 divisors (see below), whose sum is σ = 68402043072. Its totient is φ = 22455214080.

The previous prime is 42427401623. The next prime is 42427401661. The reversal of 42427401645 is 54610472424.

It is not a de Polignac number, because 42427401645 - 2⁵ = 42427401613 is a prime.

It is a super-3 number, since 3×42427401645³ (a number of 33 digits) contains 333 as substring. Note that it is a super-d number also for d = 2.

It is a Curzon number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 10793812 + ... + 10797741.

It is an arithmetic number, because the mean of its divisors is an integer number (4275127692).

Almost surely, 2^42427401645 is an apocalyptic number.

It is an amenable number.

42427401645 is a deficient number, since it is larger than the sum of its proper divisors (25974641427).

42427401645 is a wasteful number, since it uses less digits than its factorization.

42427401645 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 21591692.

The product of its (nonzero) digits is 215040, while the sum is 39.

The spelling of 42427401645 in words is "forty-two billion, four hundred twenty-seven million, four hundred one thousand, six hundred forty-five".