1081815970 has 16 divisors (see below), whose sum is σ = 1947690360. Its totient is φ = 432632704.

The previous prime is 1081815937. The next prime is 1081815989. The reversal of 1081815970 is 795181801.

It can be written as a sum of positive squares in 4 ways, for example, as 987279241 + 94536729 = 31421^2 + 9723^2 .

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, 54744 + ... + 71836.

Almost surely, 2^1081815970 is an apocalyptic number.

1081815970 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

1081815970 is a deficient number, since it is larger than the sum of its proper divisors (865874390).

1081815970 is a wasteful number, since it uses less digits than its factorization.

1081815970 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 23429.

The product of its (nonzero) digits is 20160, while the sum is 40.

The square root of 1081815970 is about 32890.9709494870. The cubic root of 1081815970 is about 1026.5602950784.

The spelling of 1081815970 in words is "one billion, eighty-one million, eight hundred fifteen thousand, nine hundred seventy".