13818620137356 has 48 divisors (see below), whose sum is σ = 35841409077600. Its totient is φ = 4604232257856.

The previous prime is 13818620137339. The next prime is 13818620137379. The reversal of 13818620137356 is 65373102681831.

13818620137356 is a `hidden beast` number, since 1 + 3 + 8 + 1 + 8 + 620 + 1 + 3 + 7 + 3 + 5 + 6 = 666.

It is a Harshad number since it is a multiple of its sum of digits (54).

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, 27169851 + ... + 27673778.

It is an arithmetic number, because the mean of its divisors is an integer number (746696022450).

Almost surely, 2^{13818620137356} is an apocalyptic number.

It is an amenable number.

13818620137356 is an abundant number, since it is smaller than the sum of its proper divisors (22022788940244).

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

13818620137356 is a wasteful number, since it uses less digits than its factorization.

13818620137356 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 54845975 (or 54845967 counting only the distinct ones).

The product of its (nonzero) digits is 4354560, while the sum is 54.

The spelling of 13818620137356 in words is "thirteen trillion, eight hundred eighteen billion, six hundred twenty million, one hundred thirty-seven thousand, three hundred fifty-six".