154879992509 has 16 divisors (see below), whose sum is σ = 171715152960. Its totient is φ = 138513951360.

The previous prime is 154879992503. The next prime is 154879992529. The reversal of 154879992509 is 905299978451.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-154879992509 is a prime.

It is a super-2 number, since 2×154879992509² (a number of 23 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (154879992503) 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 15 ways as a sum of consecutive naturals, for example, 64454 + ... + 560280.

It is an arithmetic number, because the mean of its divisors is an integer number (10732197060).

Almost surely, 2^154879992509 is an apocalyptic number.

It is an amenable number.

154879992509 is a deficient number, since it is larger than the sum of its proper divisors (16835160451).

154879992509 is a wasteful number, since it uses less digits than its factorization.

154879992509 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 496300.

The product of its (nonzero) digits is 73483200, while the sum is 68.

The spelling of 154879992509 in words is "one hundred fifty-four billion, eight hundred seventy-nine million, nine hundred ninety-two thousand, five hundred nine".