154512340561 has 4 divisors (see below), whose sum is σ = 154513256512. Its totient is φ = 154511424612.

The previous prime is 154512340559. The next prime is 154512340571. The reversal of 154512340561 is 165043215451.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also a brilliant number, because the two primes have the same length.

It is a cyclic number.

It is not a de Polignac number, because 154512340561 - 2¹ = 154512340559 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 154512340561.

It is not an unprimeable number, because it can be changed into a prime (154512340501) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 123525 + ... + 569458.

It is an arithmetic number, because the mean of its divisors is an integer number (38628314128).

Almost surely, 2^154512340561 is an apocalyptic number.

It is an amenable number.

154512340561 is a deficient number, since it is larger than the sum of its proper divisors (915951).

154512340561 is an equidigital number, since it uses as much as digits as its factorization.

154512340561 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 915950.

The product of its (nonzero) digits is 72000, while the sum is 37.

The spelling of 154512340561 in words is "one hundred fifty-four billion, five hundred twelve million, three hundred forty thousand, five hundred sixty-one".