154363378421 has 6 divisors (see below), whose sum is σ = 179565562710. Its totient is φ = 132311467176.

The previous prime is 154363378399. The next prime is 154363378439. The reversal of 154363378421 is 124873363451.

It is a happy number.

It can be written as a sum of positive squares in only one way, i.e., 144997977796 + 9365400625 = 380786^2 + 96775^2 .

It is not a de Polignac number, because 154363378421 - 2¹⁸ = 154363116277 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (154363378921) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 1575136466 + ... + 1575136563.

It is an arithmetic number, because the mean of its divisors is an integer number (29927593785).

Almost surely, 2^154363378421 is an apocalyptic number.

It is an amenable number.

154363378421 is a deficient number, since it is larger than the sum of its proper divisors (25202184289).

154363378421 is an equidigital number, since it uses as much as digits as its factorization.

154363378421 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3150273043 (or 3150273036 counting only the distinct ones).

The product of its digits is 1451520, while the sum is 47.

The spelling of 154363378421 in words is "one hundred fifty-four billion, three hundred sixty-three million, three hundred seventy-eight thousand, four hundred twenty-one".