42981608451 has 4 divisors (see below), whose sum is σ = 57308811272. Its totient is φ = 28654405632.

The previous prime is 42981608393. The next prime is 42981608471. The reversal of 42981608451 is 15480618924.

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

It is not a de Polignac number, because 42981608451 - 2¹⁷ = 42981477379 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 42981608451.

It is not an unprimeable number, because it can be changed into a prime (42981608471) 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, 7163601406 + ... + 7163601411.

It is an arithmetic number, because the mean of its divisors is an integer number (14327202818).

Almost surely, 2^42981608451 is an apocalyptic number.

42981608451 is a deficient number, since it is larger than the sum of its proper divisors (14327202821).

42981608451 is a wasteful number, since it uses less digits than its factorization.

42981608451 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 14327202820.

The product of its (nonzero) digits is 552960, while the sum is 48.

The spelling of 42981608451 in words is "forty-two billion, nine hundred eighty-one million, six hundred eight thousand, four hundred fifty-one".