154321461561 has 16 divisors (see below), whose sum is σ = 225378201600. Its totient is φ = 93490215168.

The previous prime is 154321461559. The next prime is 154321461589. The reversal of 154321461561 is 165164123451.

154321461561 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 154321461561 - 2¹ = 154321461559 is a prime.

It is a super-2 number, since 2×154321461561² (a number of 23 digits) contains 22 as substring.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (154321461061) 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 15 ways as a sum of consecutive naturals, for example, 52169401 + ... + 52172358.

It is an arithmetic number, because the mean of its divisors is an integer number (14086137600).

Almost surely, 2^154321461561 is an apocalyptic number.

It is an amenable number.

154321461561 is a deficient number, since it is larger than the sum of its proper divisors (71056740039).

154321461561 is a wasteful number, since it uses less digits than its factorization.

154321461561 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 104341808.

The product of its digits is 86400, while the sum is 39.

The spelling of 154321461561 in words is "one hundred fifty-four billion, three hundred twenty-one million, four hundred sixty-one thousand, five hundred sixty-one".