2581983663 has 16 divisors (see below), whose sum is σ = 4141528320. Its totient is φ = 1397765376.

The previous prime is 2581983659. The next prime is 2581983667. The reversal of 2581983663 is 3663891852.

It is a happy number.

It is an interprime number because it is at equal distance from previous prime (2581983659) and next prime (2581983667).

It is not a de Polignac number, because 2581983663 - 2² = 2581983659 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2581983667) 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, 3235170 + ... + 3235967.

It is an arithmetic number, because the mean of its divisors is an integer number (258845520).

Almost surely, 2^2581983663 is an apocalyptic number.

2581983663 is a deficient number, since it is larger than the sum of its proper divisors (1559544657).

2581983663 is a wasteful number, since it uses less digits than its factorization.

2581983663 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6471166.

The product of its digits is 1866240, while the sum is 51.

The square root of 2581983663 is about 50813.2233085050. The cubic root of 2581983663 is about 1371.8853866396.

The spelling of 2581983663 in words is "two billion, five hundred eighty-one million, nine hundred eighty-three thousand, six hundred sixty-three".