154754905321 has 9 divisors (see below), whose sum is σ = 157357860933. Its totient is φ = 152194336320.

The previous prime is 154754905309. The next prime is 154754905343. The reversal of 154754905321 is 123509457451.

The square root of 154754905321 is 393389.

It is a perfect power (a square), and thus also a powerful number.

It can be written as a sum of positive squares in 4 ways, for example, as 7080921 + 154747824400 = 2661^2 + 393380^2 .

It is not a de Polignac number, because 154754905321 - 2²¹ = 154752808169 is a prime.

It is a super-2 number, since 2×154754905321² (a number of 23 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (154754905391) by changing a digit.

It is a polite number, since it can be written in 8 ways as a sum of consecutive naturals, for example, 23993505 + ... + 23999953.

Almost surely, 2^154754905321 is an apocalyptic number.

154754905321 is the 393389-th square number.

154754905321 is the 196695-th centered octagonal number.

It is an amenable number.

154754905321 is a deficient number, since it is larger than the sum of its proper divisors (2602955612).

154754905321 is an frugal number, since it uses more digits than its factorization.

154754905321 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 13020 (or 6510 counting only the distinct ones).

The product of its (nonzero) digits is 756000, while the sum is 46.

The spelling of 154754905321 in words is "one hundred fifty-four billion, seven hundred fifty-four million, nine hundred five thousand, three hundred twenty-one".