8542641487 has 2 divisors, whose sum is σ = 8542641488. Its totient is φ = 8542641486.

The previous prime is 8542641473. The next prime is 8542641587. The reversal of 8542641487 is 7841462458.

It is a happy number.

It is a weak prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-8542641487 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 8542641487.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (8542641587) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 4271320743 + 4271320744.

It is an arithmetic number, because the mean of its divisors is an integer number (4271320744).

Almost surely, 2^8542641487 is an apocalyptic number.

8542641487 is a deficient number, since it is larger than the sum of its proper divisors (1).

8542641487 is an equidigital number, since it uses as much as digits as its factorization.

8542641487 is an evil number, because the sum of its binary digits is even.

The product of its digits is 1720320, while the sum is 49.

The square root of 8542641487 is about 92426.4111983150. The cubic root of 8542641487 is about 2044.2345628404.

The spelling of 8542641487 in words is "eight billion, five hundred forty-two million, six hundred forty-one thousand, four hundred eighty-seven".