2537641565 has 8 divisors (see below), whose sum is σ = 3072118968. Its totient is φ = 2012147200.

The previous prime is 2537641481. The next prime is 2537641567. The reversal of 2537641565 is 5651467352.

It is a happy number.

2537641565 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in 4 ways, for example, as 6646084 + 2530995481 = 2578^2 + 50309^2 .

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

It is not a de Polignac number, because 2537641565 - 2¹² = 2537637469 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2537641567) 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, 2245136 + ... + 2246265.

It is an arithmetic number, because the mean of its divisors is an integer number (384014871).

Almost surely, 2^2537641565 is an apocalyptic number.

It is an amenable number.

2537641565 is a deficient number, since it is larger than the sum of its proper divisors (534477403).

2537641565 is a wasteful number, since it uses less digits than its factorization.

2537641565 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4491519.

The product of its digits is 756000, while the sum is 44.

The square root of 2537641565 is about 50375.0093300239. The cubic root of 2537641565 is about 1363.9865663532.

The spelling of 2537641565 in words is "two billion, five hundred thirty-seven million, six hundred forty-one thousand, five hundred sixty-five".