42440422646 has 8 divisors (see below), whose sum is σ = 63790290504. Its totient is φ = 21176992480.

The previous prime is 42440422643. The next prime is 42440422657. The reversal of 42440422646 is 64622404424.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a super-2 number, since 2×42440422646² (a number of 22 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (42440422643) 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, 21608195 + ... + 21610158.

It is an arithmetic number, because the mean of its divisors is an integer number (7973786313).

Almost surely, 2^42440422646 is an apocalyptic number.

42440422646 is a deficient number, since it is larger than the sum of its proper divisors (21349867858).

42440422646 is a wasteful number, since it uses less digits than its factorization.

42440422646 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 43218846.

The product of its (nonzero) digits is 294912, while the sum is 38.

The spelling of 42440422646 in words is "forty-two billion, four hundred forty million, four hundred twenty-two thousand, six hundred forty-six".