2661250153 has 4 divisors (see below), whose sum is σ = 2663482068. Its totient is φ = 2659018240.

The previous prime is 2661250139. The next prime is 2661250157. The reversal of 2661250153 is 3510521662.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 1668559104 + 992691049 = 40848^2 + 31507^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-2661250153 is a prime.

It is a Smith number, since the sum of its digits (31) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (2661250157) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1114168 + ... + 1116553.

It is an arithmetic number, because the mean of its divisors is an integer number (665870517).

Almost surely, 2^2661250153 is an apocalyptic number.

It is an amenable number.

2661250153 is a deficient number, since it is larger than the sum of its proper divisors (2231915).

2661250153 is a wasteful number, since it uses less digits than its factorization.

2661250153 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2231914.

The product of its (nonzero) digits is 10800, while the sum is 31.

The square root of 2661250153 is about 51587.3061227275. The cubic root of 2661250153 is about 1385.7830120826.

The spelling of 2661250153 in words is "two billion, six hundred sixty-one million, two hundred fifty thousand, one hundred fifty-three".