1081653866 has 16 divisors (see below), whose sum is σ = 1718936640. Its totient is φ = 508712640.

The previous prime is 1081653827. The next prime is 1081653877. The reversal of 1081653866 is 6683561801.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 55421 + ... + 72351.

It is an arithmetic number, because the mean of its divisors is an integer number (107433540).

Almost surely, 2^1081653866 is an apocalyptic number.

1081653866 is a deficient number, since it is larger than the sum of its proper divisors (637282774).

1081653866 is a wasteful number, since it uses less digits than its factorization.

1081653866 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 18829.

The product of its (nonzero) digits is 207360, while the sum is 44.

The square root of 1081653866 is about 32888.5065942496. The cubic root of 1081653866 is about 1026.5090177671.

The spelling of 1081653866 in words is "one billion, eighty-one million, six hundred fifty-three thousand, eight hundred sixty-six".