2565642101 has 8 divisors (see below), whose sum is σ = 2803425984. Its totient is φ = 2328615520.

The previous prime is 2565642089. The next prime is 2565642103. The reversal of 2565642101 is 1012465652.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a de Polignac number, because none of the positive numbers 2^k-2565642101 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2565642103) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 182225 + ... + 195798.

It is an arithmetic number, because the mean of its divisors is an integer number (350428248).

Almost surely, 2^2565642101 is an apocalyptic number.

It is an amenable number.

2565642101 is a deficient number, since it is larger than the sum of its proper divisors (237783883).

2565642101 is a wasteful number, since it uses less digits than its factorization.

2565642101 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 378651.

The product of its (nonzero) digits is 14400, while the sum is 32.

The square root of 2565642101 is about 50652.1677818433. The cubic root of 2565642101 is about 1368.9850050372.

The spelling of 2565642101 in words is "two billion, five hundred sixty-five million, six hundred forty-two thousand, one hundred one".