154130749561 has 4 divisors (see below), whose sum is σ = 154230254500. Its totient is φ = 154031244624.

The previous prime is 154130749519. The next prime is 154130749607. The reversal of 154130749561 is 165947031451.

154130749561 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 165947031451 = 311 ⋅533591741.

It can be written as a sum of positive squares in 2 ways, for example, as 46077198336 + 108053551225 = 214656^2 + 328715^2 .

It is a cyclic number.

It is not a de Polignac number, because 154130749561 - 2¹⁷ = 154130618489 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (154130749501) by changing a digit.

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 in 3 ways as a sum of consecutive naturals, for example, 49750146 + ... + 49753243.

It is an arithmetic number, because the mean of its divisors is an integer number (38557563625).

Almost surely, 2^154130749561 is an apocalyptic number.

It is an amenable number.

154130749561 is a deficient number, since it is larger than the sum of its proper divisors (99504939).

154130749561 is an equidigital number, since it uses as much as digits as its factorization.

154130749561 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 99504938.

The product of its (nonzero) digits is 453600, while the sum is 46.

The spelling of 154130749561 in words is "one hundred fifty-four billion, one hundred thirty million, seven hundred forty-nine thousand, five hundred sixty-one".