1218238875504 has 80 divisors (see below), whose sum is σ = 3996339178240. Its totient is φ = 348068249280.

The previous prime is 1218238875463. The next prime is 1218238875509. The reversal of 1218238875504 is 4055788328121.

It is a happy number.

1218238875504 is a `hidden beast` number, since 1 + 2 + 1 + 8 + 2 + 3 + 8 + 87 + 550 + 4 = 666.

It is a super-2 number, since 2×1218238875504² (a number of 25 digits) contains 22 as substring.

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

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1218238875509) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 201425362 + ... + 201431409.

It is an arithmetic number, because the mean of its divisors is an integer number (49954239728).

Almost surely, 2^{1218238875504} is an apocalyptic number.

1218238875504 is a gapful number since it is divisible by the number (14) formed by its first and last digit.

It is an amenable number.

1218238875504 is an abundant number, since it is smaller than the sum of its proper divisors (2778100302736).

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

1218238875504 is a wasteful number, since it uses less digits than its factorization.

1218238875504 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 402856795 (or 402856783 counting only the distinct ones).

The product of its (nonzero) digits is 4300800, while the sum is 54.

The spelling of 1218238875504 in words is "one trillion, two hundred eighteen billion, two hundred thirty-eight million, eight hundred seventy-five thousand, five hundred four".