154166954881 has 9 divisors (see below), whose sum is σ = 154695288769. Its totient is φ = 153640423300.

The previous prime is 154166954873. The next prime is 154166954891. The reversal of 154166954881 is 188459661451.

The square root of 154166954881 is 392641.

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

It is not a de Polignac number, because 154166954881 - 2³ = 154166954873 is a prime.

It is a super-2 number, since 2×154166954881² (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 (154166954891) 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, 169227816 + ... + 169228726.

Almost surely, 2^154166954881 is an apocalyptic number.

154166954881 is the 392641-st square number.

154166954881 is the 196321-st centered octagonal number.

It is an amenable number.

154166954881 is a deficient number, since it is larger than the sum of its proper divisors (528333888).

154166954881 is an frugal number, since it uses more digits than its factorization.

154166954881 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2684 (or 1342 counting only the distinct ones).

The product of its digits is 8294400, while the sum is 58.

The spelling of 154166954881 in words is "one hundred fifty-four billion, one hundred sixty-six million, nine hundred fifty-four thousand, eight hundred eighty-one".