2015491968 has 192 divisors, whose sum is σ = 6692056800. Its totient is φ = 570322944.

The previous prime is 2015491957. The next prime is 2015491987. The reversal of 2015491968 is 8691945102.

It is a tau number, because it is divible by the number of its divisors (192).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 877830 + ... + 880122.

Almost surely, 2^2015491968 is an apocalyptic number.

2015491968 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 2015491968, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (3346028400).

2015491968 is an abundant number, since it is smaller than the sum of its proper divisors (4676564832).

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

2015491968 is a wasteful number, since it uses less digits than its factorization.

2015491968 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2429 (or 2414 counting only the distinct ones).

The product of its (nonzero) digits is 155520, while the sum is 45.

The square root of 2015491968 is about 44894.2308988583. The cubic root of 2015491968 is about 1263.1657957751.

The spelling of 2015491968 in words is "two billion, fifteen million, four hundred ninety-one thousand, nine hundred sixty-eight".