1091773979616 has 48 divisors (see below), whose sum is σ = 2867432400000. Its totient is φ = 363730919808.

The previous prime is 1091773979591. The next prime is 1091773979641. The reversal of 1091773979616 is 6169793771901.

It is an interprime number because it is at equal distance from previous prime (1091773979591) and next prime (1091773979641).

It is a tau number, because it is divible by the number of its divisors (48).

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 7 ways as a sum of consecutive naturals, for example, 2845866 + ... + 3206633.

It is an arithmetic number, because the mean of its divisors is an integer number (59738175000).

Almost surely, 2^{1091773979616} is an apocalyptic number.

1091773979616 is a gapful number since it is divisible by the number (16) formed by its first and last digit.

It is an amenable number.

1091773979616 is an abundant number, since it is smaller than the sum of its proper divisors (1775658420384).

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

1091773979616 is a wasteful number, since it uses less digits than its factorization.

1091773979616 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6054391 (or 6054383 counting only the distinct ones).

The product of its (nonzero) digits is 27005076, while the sum is 66.

The spelling of 1091773979616 in words is "one trillion, ninety-one billion, seven hundred seventy-three million, nine hundred seventy-nine thousand, six hundred sixteen".