84735203528639 has 4 divisors (see below), whose sum is σ = 86705789657256. Its totient is φ = 82764617400024.

The previous prime is 84735203528623. The next prime is 84735203528653. The reversal of 84735203528639 is 93682530253748.

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 84735203528639 - 2⁴ = 84735203528623 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 (84735203528699) 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, 985293064244 + ... + 985293064329.

It is an arithmetic number, because the mean of its divisors is an integer number (21676447414314).

Almost surely, 2^{84735203528639} is an apocalyptic number.

84735203528639 is a deficient number, since it is larger than the sum of its proper divisors (1970586128617).

84735203528639 is a wasteful number, since it uses less digits than its factorization.

84735203528639 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1970586128616.

The product of its (nonzero) digits is 261273600, while the sum is 65.

The spelling of 84735203528639 in words is "eighty-four trillion, seven hundred thirty-five billion, two hundred three million, five hundred twenty-eight thousand, six hundred thirty-nine".