1818131513752 has 64 divisors (see below), whose sum is σ = 3504796270560. Its totient is φ = 883866547200.

The previous prime is 1818131513743. The next prime is 1818131513789. The reversal of 1818131513752 is 2573151318181.

It is a Smith number, since the sum of its digits (46) coincides with the sum of the digits of its prime factors.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 20801502 + ... + 20888722.

Almost surely, 2^{1818131513752} is an apocalyptic number.

It is an amenable number.

1818131513752 is a deficient number, since it is larger than the sum of its proper divisors (1686664756808).

1818131513752 is a wasteful number, since it uses less digits than its factorization.

1818131513752 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 87724 (or 87720 counting only the distinct ones).

The product of its digits is 201600, while the sum is 46.

The spelling of 1818131513752 in words is "one trillion, eight hundred eighteen billion, one hundred thirty-one million, five hundred thirteen thousand, seven hundred fifty-two".