16445218780 has 24 divisors (see below), whose sum is σ = 34537911408. Its totient is φ = 6577525248.

The previous prime is 16445218759. The next prime is 16445218781. The reversal of 16445218780 is 8781254461.

It is a self number, because there is not a number n which added to its sum of digits gives 16445218780.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (16445218781) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 268812 + ... + 324268.

It is an arithmetic number, because the mean of its divisors is an integer number (1439079642).

Almost surely, 2^16445218780 is an apocalyptic number.

16445218780 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

16445218780 is an abundant number, since it is smaller than the sum of its proper divisors (18092692628).

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

16445218780 is a wasteful number, since it uses less digits than its factorization.

16445218780 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 70293 (or 70291 counting only the distinct ones).

The product of its (nonzero) digits is 430080, while the sum is 46.

It can be divided in two parts, 16445 and 218780, that added together give a square (235225 = 485²).

The spelling of 16445218780 in words is "sixteen billion, four hundred forty-five million, two hundred eighteen thousand, seven hundred eighty".