2523121663 has 4 divisors (see below), whose sum is σ = 2655917560. Its totient is φ = 2390325768.

The previous prime is 2523121637. The next prime is 2523121669. The reversal of 2523121663 is 3661213252.

It is a happy number.

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

It is a cyclic number.

It is not a de Polignac number, because 2523121663 - 2¹³ = 2523113471 is a prime.

It is a super-2 number, since 2×2523121663² = 12732285852599771138, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2523121669) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 66397920 + ... + 66397957.

It is an arithmetic number, because the mean of its divisors is an integer number (663979390).

Almost surely, 2^2523121663 is an apocalyptic number.

2523121663 is a deficient number, since it is larger than the sum of its proper divisors (132795897).

2523121663 is a wasteful number, since it uses less digits than its factorization.

2523121663 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 132795896.

The product of its digits is 12960, while the sum is 31.

The square root of 2523121663 is about 50230.6844767220. The cubic root of 2523121663 is about 1361.3800982758.

The spelling of 2523121663 in words is "two billion, five hundred twenty-three million, one hundred twenty-one thousand, six hundred sixty-three".