1081749555 has 12 divisors (see below), whose sum is σ = 1875032640. Its totient is φ = 576933072.

The previous prime is 1081749533. The next prime is 1081749583. The reversal of 1081749555 is 5559471801.

1081749555 is a `hidden beast` number, since 10 + 81 + 7 + 4 + 9 + 555 = 666.

It is not a de Polignac number, because 1081749555 - 2⁵ = 1081749523 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (45), and also a Moran number because the ratio is a prime number: 24038879 = 1081749555 / (1 + 0 + 8 + 1 + 7 + 4 + 9 + 5 + 5 + 5).

It is a self number, because there is not a number n which added to its sum of digits gives 1081749555.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 12019395 + ... + 12019484.

It is an arithmetic number, because the mean of its divisors is an integer number (156252720).

Almost surely, 2^1081749555 is an apocalyptic number.

1081749555 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

1081749555 is a deficient number, since it is larger than the sum of its proper divisors (793283085).

1081749555 is a wasteful number, since it uses less digits than its factorization.

1081749555 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 24038890 (or 24038887 counting only the distinct ones).

The product of its (nonzero) digits is 252000, while the sum is 45.

The square root of 1081749555 is about 32889.9613104059. The cubic root of 1081749555 is about 1026.5392870699.

The spelling of 1081749555 in words is "one billion, eighty-one million, seven hundred forty-nine thousand, five hundred fifty-five".