42545745851 has 32 divisors (see below), whose sum is σ = 52596864000. Its totient is φ = 33621768576.

The previous prime is 42545745833. The next prime is 42545745881. The reversal of 42545745851 is 15854754524.

It is a de Polignac number, because none of the positive numbers 2^k-42545745851 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 42545745851.

It is not an unprimeable number, because it can be changed into a prime (42545745821) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 604025 + ... + 670773.

It is an arithmetic number, because the mean of its divisors is an integer number (1643652000).

Almost surely, 2^42545745851 is an apocalyptic number.

42545745851 is a deficient number, since it is larger than the sum of its proper divisors (10051118149).

42545745851 is a wasteful number, since it uses less digits than its factorization.

42545745851 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 66923.

The product of its digits is 4480000, while the sum is 50.

The spelling of 42545745851 in words is "forty-two billion, five hundred forty-five million, seven hundred forty-five thousand, eight hundred fifty-one".