42445550745 has 240 divisors, whose sum is σ = 87750051840. Its totient is φ = 19564167168.

The previous prime is 42445550731. The next prime is 42445550747. The reversal of 42445550745 is 54705554424.

42445550745 is a `hidden beast` number, since 4 + 24 + 4 + 5 + 550 + 74 + 5 = 666.

It is not a de Polignac number, because 42445550745 - 2⁴ = 42445550729 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (45).

It is a self number, because there is not a number n which added to its sum of digits gives 42445550745.

It is not an unprimeable number, because it can be changed into a prime (42445550747) by changing a digit.

It is a polite number, since it can be written in 239 ways as a sum of consecutive naturals, for example, 165157657 + ... + 165157913.

It is an arithmetic number, because the mean of its divisors is an integer number (365625216).

Almost surely, 2^42445550745 is an apocalyptic number.

42445550745 is a gapful number since it is divisible by the number (45) formed by its first and last digit.

It is an amenable number.

42445550745 is an abundant number, since it is smaller than the sum of its proper divisors (45304501095).

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

42445550745 is a wasteful number, since it uses less digits than its factorization.

42445550745 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 446 (or 424 counting only the distinct ones).

The product of its (nonzero) digits is 2240000, while the sum is 45.

42445550745 divided by its sum of digits (45) gives a triangular number (943234461 = T₄₃₄₃₃).

The spelling of 42445550745 in words is "forty-two billion, four hundred forty-five million, five hundred fifty thousand, seven hundred forty-five".