216609979152 has 80 divisors (see below), whose sum is σ = 641202928640. Its totient is φ = 61725234816.

The previous prime is 216609979147. The next prime is 216609979153. The reversal of 216609979152 is 251979906612.

It is a junction number, because it is equal to n+sod(n) for n = 216609979092 and 216609979101.

It is not an unprimeable number, because it can be changed into a prime (216609979153) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 723148 + ... + 977835.

It is an arithmetic number, because the mean of its divisors is an integer number (8015036608).

Almost surely, 2^216609979152 is an apocalyptic number.

It is an amenable number.

216609979152 is an abundant number, since it is smaller than the sum of its proper divisors (424592949488).

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

216609979152 is a wasteful number, since it uses less digits than its factorization.

216609979152 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1701380 (or 1701374 counting only the distinct ones).

The product of its (nonzero) digits is 3674160, while the sum is 57.

The spelling of 216609979152 in words is "two hundred sixteen billion, six hundred nine million, nine hundred seventy-nine thousand, one hundred fifty-two".