216976520940 has 48 divisors (see below), whose sum is σ = 633948795648. Its totient is φ = 55344735424.

The previous prime is 216976520899. The next prime is 216976520977. The reversal of 216976520940 is 49025679612.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 78613302 + ... + 78616061.

It is an arithmetic number, because the mean of its divisors is an integer number (13207266576).

Almost surely, 2^216976520940 is an apocalyptic number.

216976520940 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

216976520940 is an abundant number, since it is smaller than the sum of its proper divisors (416972274708).

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

216976520940 is a wasteful number, since it uses less digits than its factorization.

216976520940 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 157229398 (or 157229396 counting only the distinct ones).

The product of its (nonzero) digits is 1632960, while the sum is 51.

The spelling of 216976520940 in words is "two hundred sixteen billion, nine hundred seventy-six million, five hundred twenty thousand, nine hundred forty".