154945364161 has 27 divisors (see below), whose sum is σ = 183880844553. Its totient is φ = 130181644320.

The previous prime is 154945364159. The next prime is 154945364201. The reversal of 154945364161 is 161463549451.

It is a happy number.

The square root of 154945364161 is 393631.

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 22408593025 + 132536771136 = 149695^2 + 364056^2 .

It is not a de Polignac number, because 154945364161 - 2¹ = 154945364159 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (49).

It is not an unprimeable number, because it can be changed into a prime (154945364131) by changing a digit.

It is a polite number, since it can be written in 26 ways as a sum of consecutive naturals, for example, 146036571 + ... + 146037631.

Almost surely, 2^154945364161 is an apocalyptic number.

154945364161 is the 393631-st square number.

154945364161 is the 196816-th centered octagonal number.

It is an amenable number.

154945364161 is a deficient number, since it is larger than the sum of its proper divisors (28935480392).

154945364161 is an frugal number, since it uses more digits than its factorization.

154945364161 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2242 (or 1121 counting only the distinct ones).

The product of its digits is 1555200, while the sum is 49.

Multiplying 154945364161 by its sum of digits (49), we get a square (7592322843889 = 2755417²).

154945364161 divided by its sum of digits (49) gives a square (3162150289 = 56233²).

The spelling of 154945364161 in words is "one hundred fifty-four billion, nine hundred forty-five million, three hundred sixty-four thousand, one hundred sixty-one".