42565655550 has 48 divisors (see below), whose sum is σ = 115159450752. Its totient is φ = 10318946400.

The previous prime is 42565655543. The next prime is 42565655557. The reversal of 42565655550 is 5555656524.

It is an interprime number because it is at equal distance from previous prime (42565655543) and next prime (42565655557).

It is a self number, because there is not a number n which added to its sum of digits gives 42565655550.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (42565655557) 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, 12897034 + ... + 12900333.

It is an arithmetic number, because the mean of its divisors is an integer number (2399155224).

Almost surely, 2^42565655550 is an apocalyptic number.

42565655550 is an abundant number, since it is smaller than the sum of its proper divisors (72593795202).

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

42565655550 is a wasteful number, since it uses less digits than its factorization.

42565655550 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 25797393 (or 25797388 counting only the distinct ones).

The product of its (nonzero) digits is 4500000, while the sum is 48.

The spelling of 42565655550 in words is "forty-two billion, five hundred sixty-five million, six hundred fifty-five thousand, five hundred fifty".