42005256550 has 24 divisors (see below), whose sum is σ = 78142710600. Its totient is φ = 16799321280.

The previous prime is 42005256547. The next prime is 42005256551. The reversal of 42005256550 is 5565250024.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (42005256551) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 250081 + ... + 382819.

It is an arithmetic number, because the mean of its divisors is an integer number (3255946275).

Almost surely, 2^42005256550 is an apocalyptic number.

42005256550 is a deficient number, since it is larger than the sum of its proper divisors (36137454050).

42005256550 is a wasteful number, since it uses less digits than its factorization.

42005256550 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 139080 (or 139075 counting only the distinct ones).

The product of its (nonzero) digits is 60000, while the sum is 34.

The spelling of 42005256550 in words is "forty-two billion, five million, two hundred fifty-six thousand, five hundred fifty".