2691021960 has 256 divisors, whose sum is σ = 10102579200. Its totient is φ = 631238400.

The previous prime is 2691021959. The next prime is 2691021979. The reversal of 2691021960 is 691201962.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 364627 + ... + 371933.

It is an arithmetic number, because the mean of its divisors is an integer number (39463200).

Almost surely, 2^2691021960 is an apocalyptic number.

2691021960 is a gapful number since it is divisible by the number (20) 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 2691021960, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (5051289600).

2691021960 is an abundant number, since it is smaller than the sum of its proper divisors (7411557240).

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

2691021960 is a wasteful number, since it uses less digits than its factorization.

2691021960 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7369 (or 7359 counting only the distinct ones).

The product of its (nonzero) digits is 11664, while the sum is 36.

The square root of 2691021960 is about 51875.0610602050. The cubic root of 2691021960 is about 1390.9315150696.

The spelling of 2691021960 in words is "two billion, six hundred ninety-one million, twenty-one thousand, nine hundred sixty".