42444352505421 has 24 divisors (see below), whose sum is σ = 64587698215040. Its totient is φ = 26785182772800.

The previous prime is 42444352505419. The next prime is 42444352505431. The reversal of 42444352505421 is 12450525344424.

42444352505421 is a `hidden beast` number, since 4 + 2 + 4 + 4 + 4 + 3 + 52 + 50 + 542 + 1 = 666.

It is not a de Polignac number, because 42444352505421 - 2¹ = 42444352505419 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 (42444352505431) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 100606960 + ... + 101027961.

Almost surely, 2^{42444352505421} is an apocalyptic number.

It is an amenable number.

42444352505421 is a deficient number, since it is larger than the sum of its proper divisors (22143345709619).

42444352505421 is a wasteful number, since it uses less digits than its factorization.

42444352505421 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 201636177 (or 201636174 counting only the distinct ones).

The product of its (nonzero) digits is 3072000, while the sum is 45.

Adding to 42444352505421 its reverse (12450525344424), we get a palindrome (54894877849845).

The spelling of 42444352505421 in words is "forty-two trillion, four hundred forty-four billion, three hundred fifty-two million, five hundred five thousand, four hundred twenty-one".