2151818214736 has 10 divisors (see below), whose sum is σ = 4169147791082. Its totient is φ = 1075909107360.

The previous prime is 2151818214719. The next prime is 2151818214743. The reversal of 2151818214736 is 6374128181512.

It can be written as a sum of positive squares in only one way, i.e., 1996975964736 + 154842250000 = 1413144^2 + 393500^2 .

It is a self number, because there is not a number n which added to its sum of digits gives 2151818214736.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 67244319195 + ... + 67244319226.

Almost surely, 2^{2151818214736} is an apocalyptic number.

It is an amenable number.

2151818214736 is a deficient number, since it is larger than the sum of its proper divisors (2017329576346).

2151818214736 is a wasteful number, since it uses less digits than its factorization.

2151818214736 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 134488638429 (or 134488638423 counting only the distinct ones).

The product of its digits is 645120, while the sum is 49.

The spelling of 2151818214736 in words is "two trillion, one hundred fifty-one billion, eight hundred eighteen million, two hundred fourteen thousand, seven hundred thirty-six".