154126981309 has 4 divisors (see below), whose sum is σ = 176145121504. Its totient is φ = 132108841116.

The previous prime is 154126981301. The next prime is 154126981319. The reversal of 154126981309 is 903189621451.

It is a happy number.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is not a de Polignac number, because 154126981309 - 2³ = 154126981301 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (154126981301) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 11009070087 + ... + 11009070100.

It is an arithmetic number, because the mean of its divisors is an integer number (44036280376).

Almost surely, 2^154126981309 is an apocalyptic number.

It is an amenable number.

154126981309 is a deficient number, since it is larger than the sum of its proper divisors (22018140195).

154126981309 is an equidigital number, since it uses as much as digits as its factorization.

154126981309 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 22018140194.

The product of its (nonzero) digits is 466560, while the sum is 49.

The spelling of 154126981309 in words is "one hundred fifty-four billion, one hundred twenty-six million, nine hundred eighty-one thousand, three hundred nine".