2645560154 has 4 divisors (see below), whose sum is σ = 3968340234. Its totient is φ = 1322780076.

The previous prime is 2645560153. The next prime is 2645560201. The reversal of 2645560154 is 4510655462.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 4510655462 = 2 ⋅2255327731.

It can be written as a sum of positive squares in only one way, i.e., 2618675929 + 26884225 = 51173^2 + 5185^2 .

It is not an unprimeable number, because it can be changed into a prime (2645560153) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 661390037 + ... + 661390040.

Almost surely, 2^2645560154 is an apocalyptic number.

2645560154 is a deficient number, since it is larger than the sum of its proper divisors (1322780080).

2645560154 is a wasteful number, since it uses less digits than its factorization.

2645560154 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1322780079.

The product of its (nonzero) digits is 144000, while the sum is 38.

The square root of 2645560154 is about 51435.0090308148. The cubic root of 2645560154 is about 1383.0542438406.

The spelling of 2645560154 in words is "two billion, six hundred forty-five million, five hundred sixty thousand, one hundred fifty-four".