1320805972854 has 24 divisors (see below), whose sum is σ = 2861845348752. Its totient is φ = 440253415440.

The previous prime is 1320805972823. The next prime is 1320805972879. The reversal of 1320805972854 is 4582795080231.

1320805972854 is a `hidden beast` number, since 1 + 3 + 20 + 8 + 0 + 597 + 28 + 5 + 4 = 666.

It is a self number, because there is not a number n which added to its sum of digits gives 1320805972854.

It is a congruent number.

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 11 ways as a sum of consecutive naturals, for example, 729594 + ... + 1781549.

It is an arithmetic number, because the mean of its divisors is an integer number (119243556198).

Almost surely, 2^{1320805972854} is an apocalyptic number.

1320805972854 is an abundant number, since it is smaller than the sum of its proper divisors (1541039375898).

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

1320805972854 is a wasteful number, since it uses less digits than its factorization.

1320805972854 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2540372 (or 2540369 counting only the distinct ones).

The product of its (nonzero) digits is 4838400, while the sum is 54.

The spelling of 1320805972854 in words is "one trillion, three hundred twenty billion, eight hundred five million, nine hundred seventy-two thousand, eight hundred fifty-four".