154855617961 has 4 divisors (see below), whose sum is σ = 168933401424. Its totient is φ = 140777834500.

The previous prime is 154855617947. The next prime is 154855618003. The reversal of 154855617961 is 169716558451.

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.

It is a cyclic number.

It is not a de Polignac number, because 154855617961 - 2¹⁵ = 154855585193 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 154855617896 and 154855617905.

It is not an unprimeable number, because it can be changed into a prime (154855617941) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 7038891715 + ... + 7038891736.

It is an arithmetic number, because the mean of its divisors is an integer number (42233350356).

Almost surely, 2^154855617961 is an apocalyptic number.

154855617961 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

It is an amenable number.

154855617961 is a deficient number, since it is larger than the sum of its proper divisors (14077783463).

154855617961 is a wasteful number, since it uses less digits than its factorization.

154855617961 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 14077783462.

The product of its digits is 9072000, while the sum is 58.

The spelling of 154855617961 in words is "one hundred fifty-four billion, eight hundred fifty-five million, six hundred seventeen thousand, nine hundred sixty-one".