2115649368 has 192 divisors, whose sum is σ = 6859157760. Its totient is φ = 598409856.

The previous prime is 2115649363. The next prime is 2115649369. The reversal of 2115649368 is 8639465112.

2115649368 is a `hidden beast` number, since 2 + 1 + 156 + 493 + 6 + 8 = 666.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2115649363) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 1455330 + ... + 1456782.

It is an arithmetic number, because the mean of its divisors is an integer number (35724780).

Almost surely, 2^2115649368 is an apocalyptic number.

2115649368 is a gapful number since it is divisible by the number (28) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 2115649368, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (3429578880).

2115649368 is an abundant number, since it is smaller than the sum of its proper divisors (4743508392).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

2115649368 is a wasteful number, since it uses less digits than its factorization.

2115649368 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1588 (or 1572 counting only the distinct ones).

The product of its digits is 311040, while the sum is 45.

The square root of 2115649368 is about 45996.1886247111. The cubic root of 2115649368 is about 1283.7522886628.

The spelling of 2115649368 in words is "two billion, one hundred fifteen million, six hundred forty-nine thousand, three hundred sixty-eight".