42544502685431 has 4 divisors (see below), whose sum is σ = 44011554502200. Its totient is φ = 41077450868664.

The previous prime is 42544502685413. The next prime is 42544502685469. The reversal of 42544502685431 is 13458620544524.

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 42544502685431 - 2¹⁰ = 42544502684407 is a prime.

It is a super-2 number, since 2×42544502685431² (a number of 28 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (42544502685931) 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, 733525908341 + ... + 733525908398.

It is an arithmetic number, because the mean of its divisors is an integer number (11002888625550).

Almost surely, 2^{42544502685431} is an apocalyptic number.

42544502685431 is a deficient number, since it is larger than the sum of its proper divisors (1467051816769).

42544502685431 is a wasteful number, since it uses less digits than its factorization.

42544502685431 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1467051816768.

The product of its (nonzero) digits is 18432000, while the sum is 53.

The spelling of 42544502685431 in words is "forty-two trillion, five hundred forty-four billion, five hundred two million, six hundred eighty-five thousand, four hundred thirty-one".