2661562145 has 32 divisors (see below), whose sum is σ = 3641742720. Its totient is φ = 1849559040.

The previous prime is 2661562129. The next prime is 2661562147. The reversal of 2661562145 is 5412651662.

It is not a de Polignac number, because 2661562145 - 2⁴ = 2661562129 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 2661562099 and 2661562108.

It is not an unprimeable number, because it can be changed into a prime (2661562147) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 146114 + ... + 163316.

It is an arithmetic number, because the mean of its divisors is an integer number (113804460).

Almost surely, 2^2661562145 is an apocalyptic number.

It is an amenable number.

2661562145 is a deficient number, since it is larger than the sum of its proper divisors (980180575).

2661562145 is a wasteful number, since it uses less digits than its factorization.

2661562145 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 17345.

The product of its digits is 86400, while the sum is 38.

The square root of 2661562145 is about 51590.3299563009. The cubic root of 2661562145 is about 1385.8371641157.

The spelling of 2661562145 in words is "two billion, six hundred sixty-one million, five hundred sixty-two thousand, one hundred forty-five".