2191456798590 has 32 divisors (see below), whose sum is σ = 5260839334560. Its totient is φ = 584239255424.

The previous prime is 2191456798589. The next prime is 2191456798639. The reversal of 2191456798590 is 958976541912.

It is a happy number.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 9207045 + ... + 9442064.

It is an arithmetic number, because the mean of its divisors is an integer number (164401229205).

Almost surely, 2^{2191456798590} is an apocalyptic number.

2191456798590 is an abundant number, since it is smaller than the sum of its proper divisors (3069382535970).

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

2191456798590 is a wasteful number, since it uses less digits than its factorization.

2191456798590 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 18653036.

The product of its (nonzero) digits is 48988800, while the sum is 66.

The spelling of 2191456798590 in words is "two trillion, one hundred ninety-one billion, four hundred fifty-six million, seven hundred ninety-eight thousand, five hundred ninety".