42478881451 has 4 divisors (see below), whose sum is σ = 42513390304. Its totient is φ = 42444372600.

The previous prime is 42478881421. The next prime is 42478881503. The reversal of 42478881451 is 15418887424.

It is a happy number.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 42478881451 - 2¹¹ = 42478879403 is a prime.

It is a super-2 number, since 2×42478881451² (a number of 22 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (42478881421) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 17252580 + ... + 17255041.

It is an arithmetic number, because the mean of its divisors is an integer number (10628347576).

Almost surely, 2^42478881451 is an apocalyptic number.

42478881451 is a deficient number, since it is larger than the sum of its proper divisors (34508853).

42478881451 is a wasteful number, since it uses less digits than its factorization.

42478881451 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 34508852.

The product of its digits is 2293760, while the sum is 52.

The spelling of 42478881451 in words is "forty-two billion, four hundred seventy-eight million, eight hundred eighty-one thousand, four hundred fifty-one".