2154618851029 has 2 divisors, whose sum is σ = 2154618851030. Its totient is φ = 2154618851028.

The previous prime is 2154618850999. The next prime is 2154618851053. The reversal of 2154618851029 is 9201588164512.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 1551980266225 + 602638584804 = 1245785^2 + 776298^2 .

It is a cyclic number.

It is not a de Polignac number, because 2154618851029 - 2²³ = 2154610462421 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (2154618857029) 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 as a sum of consecutive naturals, namely, 1077309425514 + 1077309425515.

It is an arithmetic number, because the mean of its divisors is an integer number (1077309425515).

Almost surely, 2^{2154618851029} is an apocalyptic number.

It is an amenable number.

2154618851029 is a deficient number, since it is larger than the sum of its proper divisors (1).

2154618851029 is an equidigital number, since it uses as much as digits as its factorization.

2154618851029 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 1382400, while the sum is 52.

The spelling of 2154618851029 in words is "two trillion, one hundred fifty-four billion, six hundred eighteen million, eight hundred fifty-one thousand, twenty-nine".