87820909912 has 16 divisors (see below), whose sum is σ = 164743137360. Its totient is φ = 43889406624.

The previous prime is 87820909903. The next prime is 87820909919. The reversal of 87820909912 is 21990902878.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (87820909919) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2613303 + ... + 2646694.

It is an arithmetic number, because the mean of its divisors is an integer number (10296446085).

Almost surely, 2^87820909912 is an apocalyptic number.

It is an amenable number.

87820909912 is a deficient number, since it is larger than the sum of its proper divisors (76922227448).

87820909912 is a wasteful number, since it uses less digits than its factorization.

87820909912 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5262090 (or 5262086 counting only the distinct ones).

The product of its (nonzero) digits is 1306368, while the sum is 55.

The spelling of 87820909912 in words is "eighty-seven billion, eight hundred twenty million, nine hundred nine thousand, nine hundred twelve".