1916936957447 has 16 divisors (see below), whose sum is σ = 2027665180800. Its totient is φ = 1807194745440.

The previous prime is 1916936957437. The next prime is 1916936957477. The reversal of 1916936957447 is 7447596396191.

It is a cyclic number.

It is not a de Polignac number, because 1916936957447 - 2⁴ = 1916936957431 is a prime.

It is a super-2 number, since 2×1916936957447² (a number of 25 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1916936957437) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 34204853 + ... + 34260849.

It is an arithmetic number, because the mean of its divisors is an integer number (126729073800).

Almost surely, 2^{1916936957447} is an apocalyptic number.

1916936957447 is a deficient number, since it is larger than the sum of its proper divisors (110728223353).

1916936957447 is a wasteful number, since it uses less digits than its factorization.

1916936957447 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 64766.

The product of its digits is 308629440, while the sum is 71.

The spelling of 1916936957447 in words is "one trillion, nine hundred sixteen billion, nine hundred thirty-six million, nine hundred fifty-seven thousand, four hundred forty-seven".