154557849137 has 2 divisors, whose sum is σ = 154557849138. Its totient is φ = 154557849136.

The previous prime is 154557849133. The next prime is 154557849157. The reversal of 154557849137 is 731948755451.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 138163863616 + 16393985521 = 371704^2 + 128039^2 .

It is an emirp because it is prime and its reverse (731948755451) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 154557849137 - 2² = 154557849133 is a prime.

It is not a weakly prime, because it can be changed into another prime (154557849133) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 77278924568 + 77278924569.

It is an arithmetic number, because the mean of its divisors is an integer number (77278924569).

Almost surely, 2^154557849137 is an apocalyptic number.

It is an amenable number.

154557849137 is a deficient number, since it is larger than the sum of its proper divisors (1).

154557849137 is an equidigital number, since it uses as much as digits as its factorization.

154557849137 is an evil number, because the sum of its binary digits is even.

The product of its digits is 21168000, while the sum is 59.

The spelling of 154557849137 in words is "one hundred fifty-four billion, five hundred fifty-seven million, eight hundred forty-nine thousand, one hundred thirty-seven".