87931144463 has 4 divisors (see below), whose sum is σ = 87933300840. Its totient is φ = 87928988088.

The previous prime is 87931144459. The next prime is 87931144493. The reversal of 87931144463 is 36444113978.

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 87931144463 - 2² = 87931144459 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 (87931144493) 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, 1015820 + ... + 1098977.

It is an arithmetic number, because the mean of its divisors is an integer number (21983325210).

Almost surely, 2^87931144463 is an apocalyptic number.

87931144463 is a deficient number, since it is larger than the sum of its proper divisors (2156377).

87931144463 is a wasteful number, since it uses less digits than its factorization.

87931144463 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2156376.

The product of its digits is 1741824, while the sum is 50.

The spelling of 87931144463 in words is "eighty-seven billion, nine hundred thirty-one million, one hundred forty-four thousand, four hundred sixty-three".