84157134642787 has 4 divisors (see below), whose sum is σ = 84207558332080. Its totient is φ = 84106710953496.

The previous prime is 84157134642781. The next prime is 84157134642797. The reversal of 84157134642787 is 78724643175148.

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 84157134642787 - 2²⁷ = 84157000425059 is a prime.

It is a super-2 number, since 2×84157134642787² (a number of 29 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (84157134642781) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 25211842143 + ... + 25211845480.

It is an arithmetic number, because the mean of its divisors is an integer number (21051889583020).

Almost surely, 2^{84157134642787} is an apocalyptic number.

84157134642787 is a deficient number, since it is larger than the sum of its proper divisors (50423689293).

84157134642787 is a wasteful number, since it uses less digits than its factorization.

84157134642787 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 50423689292.

The product of its digits is 252887040, while the sum is 67.

The spelling of 84157134642787 in words is "eighty-four trillion, one hundred fifty-seven billion, one hundred thirty-four million, six hundred forty-two thousand, seven hundred eighty-seven".