11628489780 has 72 divisors (see below), whose sum is σ = 35851366824. Its totient is φ = 3050092800.

The previous prime is 11628489739. The next prime is 11628489781. The reversal of 11628489780 is 8798482611.

11628489780 is a `hidden beast` number, since 1 + 1 + 628 + 4 + 8 + 9 + 7 + 8 + 0 = 666.

It can be written as a sum of positive squares in 4 ways, for example, as 213276816 + 11415212964 = 14604^2 + 106842^2 .

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (11628489781) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 518551 + ... + 540510.

Almost surely, 2^11628489780 is an apocalyptic number.

11628489780 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

11628489780 is an abundant number, since it is smaller than the sum of its proper divisors (24222877044).

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

11628489780 is a wasteful number, since it uses less digits than its factorization.

11628489780 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1059137 (or 1059132 counting only the distinct ones).

The product of its (nonzero) digits is 1548288, while the sum is 54.

The spelling of 11628489780 in words is "eleven billion, six hundred twenty-eight million, four hundred eighty-nine thousand, seven hundred eighty".