42993081601 has 4 divisors (see below), whose sum is σ = 43992920752. Its totient is φ = 41993242452.

The previous prime is 42993081563. The next prime is 42993081629. The reversal of 42993081601 is 10618039924.

It is a happy number.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 42993081601 - 2⁷ = 42993081473 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (43), and also a Moran number because the ratio is a prime number: 999839107 = 42993081601 / (4 + 2 + 9 + 9 + 3 + 0 + 8 + 1 + 6 + 0 + 1).

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (42993081661) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 499919511 + ... + 499919596.

It is an arithmetic number, because the mean of its divisors is an integer number (10998230188).

Almost surely, 2^42993081601 is an apocalyptic number.

It is an amenable number.

42993081601 is a deficient number, since it is larger than the sum of its proper divisors (999839151).

42993081601 is an equidigital number, since it uses as much as digits as its factorization.

42993081601 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 999839150.

The product of its (nonzero) digits is 93312, while the sum is 43.

The spelling of 42993081601 in words is "forty-two billion, nine hundred ninety-three million, eighty-one thousand, six hundred one".