154640545509 has 32 divisors (see below), whose sum is σ = 221099725440. Its totient is φ = 95798495232.

The previous prime is 154640545459. The next prime is 154640545529. The reversal of 154640545509 is 905545046451.

It is not a de Polignac number, because 154640545509 - 2⁹ = 154640544997 is a prime.

It is a super-2 number, since 2×154640545509² (a number of 23 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (154640545529) 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 31 ways as a sum of consecutive naturals, for example, 1524049 + ... + 1622345.

It is an arithmetic number, because the mean of its divisors is an integer number (6909366420).

Almost surely, 2^154640545509 is an apocalyptic number.

It is an amenable number.

154640545509 is a deficient number, since it is larger than the sum of its proper divisors (66459179931).

154640545509 is a wasteful number, since it uses less digits than its factorization.

154640545509 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 98709.

The product of its (nonzero) digits is 2160000, while the sum is 48.

The spelling of 154640545509 in words is "one hundred fifty-four billion, six hundred forty million, five hundred forty-five thousand, five hundred nine".