2118651851553 has 16 divisors (see below), whose sum is σ = 2978560918080. Its totient is φ = 1335839399424.

The previous prime is 2118651851549. The next prime is 2118651851579. The reversal of 2118651851553 is 3551581568112.

It is not a de Polignac number, because 2118651851553 - 2² = 2118651851549 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 2118651851496 and 2118651851505.

It is not an unprimeable number, because it can be changed into a prime (2118651851053) by changing a digit.

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 15 ways as a sum of consecutive naturals, for example, 31306276 + ... + 31373877.

It is an arithmetic number, because the mean of its divisors is an integer number (186160057380).

Almost surely, 2^{2118651851553} is an apocalyptic number.

It is an amenable number.

2118651851553 is a deficient number, since it is larger than the sum of its proper divisors (859909066527).

2118651851553 is a wasteful number, since it uses less digits than its factorization.

2118651851553 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 62680768.

The product of its digits is 1440000, while the sum is 51.

The spelling of 2118651851553 in words is "two trillion, one hundred eighteen billion, six hundred fifty-one million, eight hundred fifty-one thousand, five hundred fifty-three".