42447236451 has 4 divisors (see below), whose sum is σ = 56596315272. Its totient is φ = 28298157632.

The previous prime is 42447236441. The next prime is 42447236453. The reversal of 42447236451 is 15463274424.

It is a happy number.

42447236451 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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 42447236451 - 2²⁵ = 42413682019 is a prime.

It is not an unprimeable number, because it can be changed into a prime (42447236453) 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, 7074539406 + ... + 7074539411.

It is an arithmetic number, because the mean of its divisors is an integer number (14149078818).

Almost surely, 2^42447236451 is an apocalyptic number.

42447236451 is a deficient number, since it is larger than the sum of its proper divisors (14149078821).

42447236451 is a wasteful number, since it uses less digits than its factorization.

42447236451 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 14149078820.

The product of its digits is 645120, while the sum is 42.

The spelling of 42447236451 in words is "forty-two billion, four hundred forty-seven million, two hundred thirty-six thousand, four hundred fifty-one".