216739597980 has 48 divisors (see below), whose sum is σ = 606891106080. Its totient is φ = 57795299328.

The previous prime is 216739597973. The next prime is 216739598003. The reversal of 216739597980 is 89795937612.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 3362212 + ... + 3426068.

It is an arithmetic number, because the mean of its divisors is an integer number (12643564710).

Almost surely, 2^216739597980 is an apocalyptic number.

216739597980 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

216739597980 is an abundant number, since it is smaller than the sum of its proper divisors (390151508100).

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

216739597980 is a wasteful number, since it uses less digits than its factorization.

216739597980 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 120438 (or 120436 counting only the distinct ones).

The product of its (nonzero) digits is 51438240, while the sum is 66.

The spelling of 216739597980 in words is "two hundred sixteen billion, seven hundred thirty-nine million, five hundred ninety-seven thousand, nine hundred eighty".