1091338770256 has 40 divisors (see below), whose sum is σ = 2462130877824. Its totient is φ = 458891771520.

The previous prime is 1091338770251. The next prime is 1091338770299. The reversal of 1091338770256 is 6520778331901.

1091338770256 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a super-2 number, since 2×1091338770256² (a number of 25 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1091338770251) 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, 91919500 + ... + 91931371.

Almost surely, 2^{1091338770256} is an apocalyptic number.

1091338770256 is a gapful number since it is divisible by the number (16) formed by its first and last digit.

It is an amenable number.

1091338770256 is an abundant number, since it is smaller than the sum of its proper divisors (1370792107568).

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

1091338770256 is a wasteful number, since it uses less digits than its factorization.

1091338770256 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 183850939 (or 183850933 counting only the distinct ones).

The product of its (nonzero) digits is 1905120, while the sum is 52.

The spelling of 1091338770256 in words is "one trillion, ninety-one billion, three hundred thirty-eight million, seven hundred seventy thousand, two hundred fifty-six".