87181681484 has 6 divisors (see below), whose sum is σ = 152567942604. Its totient is φ = 43590840740.

The previous prime is 87181681459. The next prime is 87181681537. The reversal of 87181681484 is 48418618178.

It is a happy number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10897710182 + ... + 10897710189.

It is an arithmetic number, because the mean of its divisors is an integer number (25427990434).

Almost surely, 2^87181681484 is an apocalyptic number.

It is an amenable number.

87181681484 is a deficient number, since it is larger than the sum of its proper divisors (65386261120).

87181681484 is a wasteful number, since it uses less digits than its factorization.

87181681484 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 21795420375 (or 21795420373 counting only the distinct ones).

The product of its digits is 2752512, while the sum is 56.

The spelling of 87181681484 in words is "eighty-seven billion, one hundred eighty-one million, six hundred eighty-one thousand, four hundred eighty-four".