154943661 has 8 divisors (see below), whose sum is σ = 218744064. Its totient is φ = 97219520.

The previous prime is 154943647. The next prime is 154943669. The reversal of 154943661 is 166349451.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 154943661 - 2⁷ = 154943533 is a prime.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (154943669) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1519005 + ... + 1519106.

It is an arithmetic number, because the mean of its divisors is an integer number (27343008).

Almost surely, 2^154943661 is an apocalyptic number.

It is an amenable number.

154943661 is a deficient number, since it is larger than the sum of its proper divisors (63800403).

154943661 is a wasteful number, since it uses less digits than its factorization.

154943661 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3038131.

The product of its digits is 77760, while the sum is 39.

The square root of 154943661 is about 12447.6367636592. The cubic root of 154943661 is about 537.1034447298.

The spelling of 154943661 in words is "one hundred fifty-four million, nine hundred forty-three thousand, six hundred sixty-one".