6191661916 has 48 divisors (see below), whose sum is σ = 12354064128. Its totient is φ = 2687731200.

The previous prime is 6191661887. The next prime is 6191661923.

It is a happy number.

6191661916 is nontrivially palindromic in base 10.

It is a Smith number, since the sum of its digits (46) coincides with the sum of the digits of its prime factors.

It is a Harshad number since it is a multiple of its sum of digits (46).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 676531 + ... + 685621.

It is an arithmetic number, because the mean of its divisors is an integer number (257376336).

Almost surely, 2^6191661916 is an apocalyptic number.

It is an amenable number.

6191661916 is a deficient number, since it is larger than the sum of its proper divisors (6162402212).

6191661916 is a wasteful number, since it uses less digits than its factorization.

6191661916 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9802 (or 9800 counting only the distinct ones).

The product of its digits is 104976, while the sum is 46.

The square root of 6191661916 is about 78687.1140403561. The cubic root of 6191661916 is about 1836.2666421008.

The spelling of 6191661916 in words is "six billion, one hundred ninety-one million, six hundred sixty-one thousand, nine hundred sixteen".