1091948633784 has 64 divisors (see below), whose sum is σ = 3033280461600. Its totient is φ = 363972100608.

The previous prime is 1091948633773. The next prime is 1091948633821. The reversal of 1091948633784 is 4873368491901.

1091948633784 is a `hidden beast` number, since 10 + 9 + 194 + 8 + 63 + 378 + 4 = 666.

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, 11069062 + ... + 11167274.

Almost surely, 2^{1091948633784} is an apocalyptic number.

It is an amenable number.

1091948633784 is an abundant number, since it is smaller than the sum of its proper divisors (1941331827816).

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

1091948633784 is a wasteful number, since it uses less digits than its factorization.

1091948633784 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 149701 (or 149691 counting only the distinct ones).

The product of its (nonzero) digits is 31352832, while the sum is 63.

The spelling of 1091948633784 in words is "one trillion, ninety-one billion, nine hundred forty-eight million, six hundred thirty-three thousand, seven hundred eighty-four".