1091749388816 has 40 divisors (see below), whose sum is σ = 2157227446464. Its totient is φ = 535065148800.

The previous prime is 1091749388809. The next prime is 1091749388819. The reversal of 1091749388816 is 6188839471901.

It is not an unprimeable number, because it can be changed into a prime (1091749388819) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 278765 + ... + 1503731.

Almost surely, 2^{1091749388816} is an apocalyptic number.

1091749388816 is a gapful number since it is divisible by the number (16) formed by its first and last digit.

It is an amenable number.

1091749388816 is a deficient number, since it is larger than the sum of its proper divisors (1065478057648).

1091749388816 is a wasteful number, since it uses less digits than its factorization.

1091749388816 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1226079 (or 1226073 counting only the distinct ones).

The product of its (nonzero) digits is 20901888, while the sum is 65.

The spelling of 1091749388816 in words is "one trillion, ninety-one billion, seven hundred forty-nine million, three hundred eighty-eight thousand, eight hundred sixteen".