154709275561 has 3 divisors (see below), whose sum is σ = 154709668893. Its totient is φ = 154708882230.

The previous prime is 154709275519. The next prime is 154709275571. The reversal of 154709275561 is 165572907451.

The square root of 154709275561 is 393331.

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

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length.

It is not a de Polignac number, because 154709275561 - 2³¹ = 152561791913 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 154709275499 and 154709275508.

It is not an unprimeable number, because it can be changed into a prime (154709275571) by changing a digit.

It is a polite number, since it can be written in 2 ways as a sum of consecutive naturals, for example, 196666 + ... + 589996.

It is an arithmetic number, because the mean of its divisors is an integer number (51569889631).

Almost surely, 2^154709275561 is an apocalyptic number.

154709275561 is the 393331-st square number.

154709275561 is the 196666-th centered octagonal number.

It is an amenable number.

154709275561 is a deficient number, since it is larger than the sum of its proper divisors (393332).

154709275561 is an frugal number, since it uses more digits than its factorization.

154709275561 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 786662 (or 393331 counting only the distinct ones).

The product of its (nonzero) digits is 2646000, while the sum is 52.

The spelling of 154709275561 in words is "one hundred fifty-four billion, seven hundred nine million, two hundred seventy-five thousand, five hundred sixty-one".