1081521668 has 12 divisors (see below), whose sum is σ = 1893113040. Its totient is φ = 540632232.

The previous prime is 1081521659. The next prime is 1081521671. The reversal of 1081521668 is 8661251801.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 11798 + ... + 47981.

It is an arithmetic number, because the mean of its divisors is an integer number (157759420).

Almost surely, 2^1081521668 is an apocalyptic number.

It is an amenable number.

1081521668 is a deficient number, since it is larger than the sum of its proper divisors (811591372).

1081521668 is a wasteful number, since it uses less digits than its factorization.

1081521668 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 64306 (or 64304 counting only the distinct ones).

The product of its (nonzero) digits is 23040, while the sum is 38.

The square root of 1081521668 is about 32886.4967425842. The cubic root of 1081521668 is about 1026.4671966349.

The spelling of 1081521668 in words is "one billion, eighty-one million, five hundred twenty-one thousand, six hundred sixty-eight".