84251065557 has 32 divisors (see below), whose sum is σ = 114638832000. Its totient is φ = 55027924992.

The previous prime is 84251065543. The next prime is 84251065573. The reversal of 84251065557 is 75556015248.

It is not a de Polignac number, because 84251065557 - 2¹⁹ = 84250541269 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (84251065757) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 28529193 + ... + 28532145.

It is an arithmetic number, because the mean of its divisors is an integer number (3582463500).

Almost surely, 2^84251065557 is an apocalyptic number.

It is an amenable number.

84251065557 is a deficient number, since it is larger than the sum of its proper divisors (30387766443).

84251065557 is a wasteful number, since it uses less digits than its factorization.

84251065557 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3957.

The product of its (nonzero) digits is 1680000, while the sum is 48.

The spelling of 84251065557 in words is "eighty-four billion, two hundred fifty-one million, sixty-five thousand, five hundred fifty-seven".