2610165561 has 16 divisors (see below), whose sum is σ = 3604167360. Its totient is φ = 1678268480.

The previous prime is 2610165553. The next prime is 2610165563. The reversal of 2610165561 is 1655610162.

It is a cyclic number.

It is not a de Polignac number, because 2610165561 - 2³ = 2610165553 is a prime.

It is not an unprimeable number, because it can be changed into a prime (2610165563) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 65926 + ... + 97808.

It is an arithmetic number, because the mean of its divisors is an integer number (225260460).

Almost surely, 2^2610165561 is an apocalyptic number.

It is an amenable number.

2610165561 is a deficient number, since it is larger than the sum of its proper divisors (994001799).

2610165561 is a wasteful number, since it uses less digits than its factorization.

2610165561 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 32856.

The product of its (nonzero) digits is 10800, while the sum is 33.

The square root of 2610165561 is about 51089.7794181967. The cubic root of 2610165561 is about 1376.8586322354.

The spelling of 2610165561 in words is "two billion, six hundred ten million, one hundred sixty-five thousand, five hundred sixty-one".