561000154 has 32 divisors (see below), whose sum is σ = 1000569024. Its totient is φ = 232538880.

The previous prime is 561000133. The next prime is 561000163. The reversal of 561000154 is 451000165.

It is a Harshad number since it is a multiple of its sum of digits (22).

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 11922 + ... + 35554.

It is an arithmetic number, because the mean of its divisors is an integer number (31267782).

Almost surely, 2^561000154 is an apocalyptic number.

561000154 is a deficient number, since it is larger than the sum of its proper divisors (439568870).

561000154 is a wasteful number, since it uses less digits than its factorization.

561000154 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 23742.

The product of its (nonzero) digits is 600, while the sum is 22.

The square root of 561000154 is about 23685.4418155963. The cubic root of 561000154 is about 824.7474728793.

The spelling of 561000154 in words is "five hundred sixty-one million, one hundred fifty-four", and thus it is an aban number.