2115505863 has 16 divisors (see below), whose sum is σ = 3137923840. Its totient is φ = 1408608792.

The previous prime is 2115505853. The next prime is 2115505879. The reversal of 2115505863 is 3685055112.

It is a happy number.

2115505863 is a `hidden beast` number, since 21 + 1 + 5 + 50 + 586 + 3 = 666.

It is not a de Polignac number, because 2115505863 - 2¹² = 2115501767 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 (2115505853) 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, 25381 + ... + 69822.

It is an arithmetic number, because the mean of its divisors is an integer number (196120240).

Almost surely, 2^2115505863 is an apocalyptic number.

2115505863 is a deficient number, since it is larger than the sum of its proper divisors (1022417977).

2115505863 is an equidigital number, since it uses as much as digits as its factorization.

2115505863 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 96035 (or 96029 counting only the distinct ones).

The product of its (nonzero) digits is 36000, while the sum is 36.

The square root of 2115505863 is about 45994.6286320479. The cubic root of 2115505863 is about 1283.7232622654.

The spelling of 2115505863 in words is "two billion, one hundred fifteen million, five hundred five thousand, eight hundred sixty-three".