87192918612 has 24 divisors (see below), whose sum is σ = 226055715200. Its totient is φ = 29064306168.

The previous prime is 87192918559. The next prime is 87192918613. The reversal of 87192918612 is 21681929178.

It is a happy number.

87192918612 is a `hidden beast` number, since 8 + 7 + 1 + 9 + 2 + 9 + 18 + 612 = 666.

It is a Harshad number since it is a multiple of its sum of digits (54).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (87192918613) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 403670812 + ... + 403671027.

Almost surely, 2^87192918612 is an apocalyptic number.

It is an amenable number.

87192918612 is an abundant number, since it is smaller than the sum of its proper divisors (138862796588).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

87192918612 is a wasteful number, since it uses less digits than its factorization.

87192918612 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 807341852 (or 807341844 counting only the distinct ones).

The product of its digits is 870912, while the sum is 54.

The spelling of 87192918612 in words is "eighty-seven billion, one hundred ninety-two million, nine hundred eighteen thousand, six hundred twelve".