42365554588921 has 4 divisors (see below), whose sum is σ = 43732185382144. Its totient is φ = 40998923795700.

The previous prime is 42365554588901. The next prime is 42365554588949. The reversal of 42365554588921 is 12988545556324.

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 a de Polignac number, because none of the positive numbers 2^k-42365554588921 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (42365554588901) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (31) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 683315396565 + ... + 683315396626.

It is an arithmetic number, because the mean of its divisors is an integer number (10933046345536).

Almost surely, 2^{42365554588921} is an apocalyptic number.

It is an amenable number.

42365554588921 is a deficient number, since it is larger than the sum of its proper divisors (1366630793223).

42365554588921 is a wasteful number, since it uses less digits than its factorization.

42365554588921 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1366630793222.

The product of its digits is 414720000, while the sum is 67.

The spelling of 42365554588921 in words is "forty-two trillion, three hundred sixty-five billion, five hundred fifty-four million, five hundred eighty-eight thousand, nine hundred twenty-one".