42647781487 has 4 divisors (see below), whose sum is σ = 44502032880. Its totient is φ = 40793530096.

The previous prime is 42647781469. The next prime is 42647781521. The reversal of 42647781487 is 78418774624.

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 42647781487 - 2¹⁵ = 42647748719 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (42647781587) 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, 927125662 + ... + 927125707.

It is an arithmetic number, because the mean of its divisors is an integer number (11125508220).

Almost surely, 2^42647781487 is an apocalyptic number.

42647781487 is a deficient number, since it is larger than the sum of its proper divisors (1854251393).

42647781487 is a wasteful number, since it uses less digits than its factorization.

42647781487 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1854251392.

The product of its digits is 16859136, while the sum is 58.

The spelling of 42647781487 in words is "forty-two billion, six hundred forty-seven million, seven hundred eighty-one thousand, four hundred eighty-seven".