42661445245 has 8 divisors (see below), whose sum is σ = 51406157880. Its totient is φ = 33987540480.

The previous prime is 42661445231. The next prime is 42661445257. The reversal of 42661445245 is 54254416624.

It can be written as a sum of positive squares in 4 ways, for example, as 2377342564 + 40284102681 = 48758^2 + 200709^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 42661445245 - 2⁷ = 42661445117 is a prime.

It is a super-2 number, since 2×42661445245² (a number of 22 digits) contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 17700640 + ... + 17703049.

It is an arithmetic number, because the mean of its divisors is an integer number (6425769735).

Almost surely, 2^42661445245 is an apocalyptic number.

It is an amenable number.

42661445245 is a deficient number, since it is larger than the sum of its proper divisors (8744712635).

42661445245 is a wasteful number, since it uses less digits than its factorization.

42661445245 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 35403935.

The product of its digits is 921600, while the sum is 43.

The spelling of 42661445245 in words is "forty-two billion, six hundred sixty-one million, four hundred forty-five thousand, two hundred forty-five".