216926453280 has 96 divisors (see below), whose sum is σ = 685040134464. Its totient is φ = 57701293056.

The previous prime is 216926453279. The next prime is 216926453417. The reversal of 216926453280 is 82354629612.

It is a happy number.

It is a tau number, because it is divible by the number of its divisors (96).

It is a super-2 number, since 2×216926453280² (a number of 23 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (48).

It is an unprimeable number.

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 15 ways as a sum of consecutive naturals, for example, 378622 + ... + 759741.

It is an arithmetic number, because the mean of its divisors is an integer number (7135834734).

Almost surely, 2^216926453280 is an apocalyptic number.

216926453280 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

216926453280 is an abundant number, since it is smaller than the sum of its proper divisors (468113681184).

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

216926453280 is a wasteful number, since it uses less digits than its factorization.

216926453280 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1138778 (or 1138770 counting only the distinct ones).

The product of its (nonzero) digits is 1244160, while the sum is 48.

The spelling of 216926453280 in words is "two hundred sixteen billion, nine hundred twenty-six million, four hundred fifty-three thousand, two hundred eighty".