1091916685250 has 32 divisors (see below), whose sum is σ = 2164307339376. Its totient is φ = 411074515200.

The previous prime is 1091916685243. The next prime is 1091916685273. The reversal of 1091916685250 is 525866191901.

It can be written as a sum of positive squares in 8 ways, for example, as 46048438921 + 1045868246329 = 214589^2 + 1022677^2 .

It is a junction number, because it is equal to n+sod(n) for n = 1091916685192 and 1091916685201.

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, 128456537 + ... + 128465036.

Almost surely, 2^{1091916685250} is an apocalyptic number.

1091916685250 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

1091916685250 is a deficient number, since it is larger than the sum of its proper divisors (1072390654126).

1091916685250 is a wasteful number, since it uses less digits than its factorization.

1091916685250 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 256921607 (or 256921597 counting only the distinct ones).

The product of its (nonzero) digits is 1166400, while the sum is 53.

The spelling of 1091916685250 in words is "one trillion, ninety-one billion, nine hundred sixteen million, six hundred eighty-five thousand, two hundred fifty".