42044420451 has 32 divisors (see below), whose sum is σ = 64882073088. Its totient is φ = 23934717440.

The previous prime is 42044420449. The next prime is 42044420459. The reversal of 42044420451 is 15402444024.

It is a cyclic number.

It is not a de Polignac number, because 42044420451 - 2¹ = 42044420449 is a prime.

It is not an unprimeable number, because it can be changed into a prime (42044420459) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 207685 + ... + 356681.

It is an arithmetic number, because the mean of its divisors is an integer number (2027564784).

Almost surely, 2^42044420451 is an apocalyptic number.

42044420451 is a deficient number, since it is larger than the sum of its proper divisors (22837652637).

42044420451 is a wasteful number, since it uses less digits than its factorization.

42044420451 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 149531.

The product of its (nonzero) digits is 20480, while the sum is 30.

Adding to 42044420451 its reverse (15402444024), we get a palindrome (57446864475).

The spelling of 42044420451 in words is "forty-two billion, forty-four million, four hundred twenty thousand, four hundred fifty-one".