2191037964 has 24 divisors (see below), whose sum is σ = 5277339648. Its totient is φ = 706786320.

The previous prime is 2191037951. The next prime is 2191037977. The reversal of 2191037964 is 4697301912.

It is an interprime number because it is at equal distance from previous prime (2191037951) and next prime (2191037977).

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2944572 + ... + 2945315.

It is an arithmetic number, because the mean of its divisors is an integer number (219889152).

Almost surely, 2^2191037964 is an apocalyptic number.

It is an amenable number.

2191037964 is an abundant number, since it is smaller than the sum of its proper divisors (3086301684).

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

2191037964 is a wasteful number, since it uses less digits than its factorization.

2191037964 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5889925 (or 5889923 counting only the distinct ones).

The product of its (nonzero) digits is 81648, while the sum is 42.

The square root of 2191037964 is about 46808.5244800560. The cubic root of 2191037964 is about 1298.8229906828.

The spelling of 2191037964 in words is "two billion, one hundred ninety-one million, thirty-seven thousand, nine hundred sixty-four".