18779937543552 has 64 divisors (see below), whose sum is σ = 49902085186560. Its totient is φ = 6257735907840.

The previous prime is 18779937543511. The next prime is 18779937543557. The reversal of 18779937543552 is 25534573997781.

It is a happy number.

It is a tau number, because it is divible by the number of its divisors (64).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (18779937543557) 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, 7689648 + ... + 9833135.

It is an arithmetic number, because the mean of its divisors is an integer number (779720081040).

Almost surely, 2^{18779937543552} is an apocalyptic number.

18779937543552 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

18779937543552 is an abundant number, since it is smaller than the sum of its proper divisors (31122147643008).

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

18779937543552 is a wasteful number, since it uses less digits than its factorization.

18779937543552 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 17525591 (or 17525579 counting only the distinct ones).

The product of its digits is 2000376000, while the sum is 75.

The spelling of 18779937543552 in words is "eighteen trillion, seven hundred seventy-nine billion, nine hundred thirty-seven million, five hundred forty-three thousand, five hundred fifty-two".