154136023428521 has 2 divisors, whose sum is σ = 154136023428522. Its totient is φ = 154136023428520.

The previous prime is 154136023428511. The next prime is 154136023428539. The reversal of 154136023428521 is 125824320631451.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 153263508641296 + 872514787225 = 12379964^2 + 934085^2 .

It is a cyclic number.

It is not a de Polignac number, because 154136023428521 - 2¹⁰ = 154136023427497 is a prime.

It is not a weakly prime, because it can be changed into another prime (154136023428511) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 77068011714260 + 77068011714261.

It is an arithmetic number, because the mean of its divisors is an integer number (77068011714261).

Almost surely, 2^{154136023428521} is an apocalyptic number.

It is an amenable number.

154136023428521 is a deficient number, since it is larger than the sum of its proper divisors (1).

154136023428521 is an equidigital number, since it uses as much as digits as its factorization.

154136023428521 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1382400, while the sum is 47.

The spelling of 154136023428521 in words is "one hundred fifty-four trillion, one hundred thirty-six billion, twenty-three million, four hundred twenty-eight thousand, five hundred twenty-one".