42817511947 has 16 divisors (see below), whose sum is σ = 49180545792. Its totient is φ = 36516348000.

The previous prime is 42817511917. The next prime is 42817511951. The reversal of 42817511947 is 74911571824.

42817511947 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a cyclic number.

It is not a de Polignac number, because 42817511947 - 2²⁷ = 42683294219 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 42817511947.

It is not an unprimeable number, because it can be changed into a prime (42817511917) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1739508 + ... + 1763950.

It is an arithmetic number, because the mean of its divisors is an integer number (3073784112).

Almost surely, 2^42817511947 is an apocalyptic number.

42817511947 is a deficient number, since it is larger than the sum of its proper divisors (6363033845).

42817511947 is a wasteful number, since it uses less digits than its factorization.

42817511947 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 25698.

The product of its digits is 564480, while the sum is 49.

The spelling of 42817511947 in words is "forty-two billion, eight hundred seventeen million, five hundred eleven thousand, nine hundred forty-seven".