87042687513 has 16 divisors (see below), whose sum is σ = 122930130816. Its totient is φ = 54594425600.

The previous prime is 87042687497. The next prime is 87042687541. The reversal of 87042687513 is 31578624078.

It is not a de Polignac number, because 87042687513 - 2⁴ = 87042687497 is a prime.

It is a super-3 number, since 3×87042687513³ (a number of 34 digits) contains 333 as substring. Note that it is a super-d number also for d = 2.

It is a Harshad number since it is a multiple of its sum of digits (51).

It is not an unprimeable number, because it can be changed into a prime (87042687583) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 184638 + ... + 456263.

It is an arithmetic number, because the mean of its divisors is an integer number (7683133176).

Almost surely, 2^87042687513 is an apocalyptic number.

It is an amenable number.

87042687513 is a deficient number, since it is larger than the sum of its proper divisors (35887443303).

87042687513 is a wasteful number, since it uses less digits than its factorization.

87042687513 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 643584.

The product of its (nonzero) digits is 2257920, while the sum is 51.

The spelling of 87042687513 in words is "eighty-seven billion, forty-two million, six hundred eighty-seven thousand, five hundred thirteen".