42001252049989 has 4 divisors (see below), whose sum is σ = 42008396340960. Its totient is φ = 41994107759020.

The previous prime is 42001252049957. The next prime is 42001252050041. The reversal of 42001252049989 is 98994025210024.

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 42001252049989 - 2⁵ = 42001252049957 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (42001252349989) 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, 3572136667 + ... + 3572148424.

It is an arithmetic number, because the mean of its divisors is an integer number (10502099085240).

Almost surely, 2^{42001252049989} is an apocalyptic number.

It is an amenable number.

42001252049989 is a deficient number, since it is larger than the sum of its proper divisors (7144290971).

42001252049989 is an equidigital number, since it uses as much as digits as its factorization.

42001252049989 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7144290970.

The product of its (nonzero) digits is 3732480, while the sum is 55.

The spelling of 42001252049989 in words is "forty-two trillion, one billion, two hundred fifty-two million, forty-nine thousand, nine hundred eighty-nine".