42001954745 has 4 divisors (see below), whose sum is σ = 50402345700. Its totient is φ = 33601563792.

The previous prime is 42001954741. The next prime is 42001954747. The reversal of 42001954745 is 54745910024.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 26418926521 + 15583028224 = 162539^2 + 124832^2 .

It is a cyclic number.

It is not a de Polignac number, because 42001954745 - 2² = 42001954741 is a prime.

It is not an unprimeable number, because it can be changed into a prime (42001954741) 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, 4200195470 + ... + 4200195479.

It is an arithmetic number, because the mean of its divisors is an integer number (12600586425).

Almost surely, 2^42001954745 is an apocalyptic number.

It is an amenable number.

42001954745 is a deficient number, since it is larger than the sum of its proper divisors (8400390955).

42001954745 is an equidigital number, since it uses as much as digits as its factorization.

42001954745 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8400390954.

The product of its (nonzero) digits is 201600, while the sum is 41.

The spelling of 42001954745 in words is "forty-two billion, one million, nine hundred fifty-four thousand, seven hundred forty-five".