1318957352820 has 72 divisors (see below), whose sum is σ = 4002835820256. Its totient is φ = 351546267072.

The previous prime is 1318957352789. The next prime is 1318957352887. The reversal of 1318957352820 is 282537598131.

1318957352820 is a `hidden beast` number, since 1 + 3 + 1 + 8 + 95 + 7 + 3 + 528 + 20 = 666.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 1468602 + ... + 2189681.

It is an arithmetic number, because the mean of its divisors is an integer number (55594941948).

Almost surely, 2^{1318957352820} is an apocalyptic number.

1318957352820 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1318957352820 is an abundant number, since it is smaller than the sum of its proper divisors (2683878467436).

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

1318957352820 is a wasteful number, since it uses less digits than its factorization.

1318957352820 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3660301 (or 3660296 counting only the distinct ones).

The product of its (nonzero) digits is 3628800, while the sum is 54.

The spelling of 1318957352820 in words is "one trillion, three hundred eighteen billion, nine hundred fifty-seven million, three hundred fifty-two thousand, eight hundred twenty".