1081540651 has 8 divisors (see below), whose sum is σ = 1084838400. Its totient is φ = 1078249320.

The previous prime is 1081540639. The next prime is 1081540717. The reversal of 1081540651 is 1560451801.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 1081540651 - 2⁹ = 1081540139 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1081540751) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 740560 + ... + 742018.

It is an arithmetic number, because the mean of its divisors is an integer number (135604800).

Almost surely, 2^1081540651 is an apocalyptic number.

1081540651 is a deficient number, since it is larger than the sum of its proper divisors (3297749).

1081540651 is a wasteful number, since it uses less digits than its factorization.

1081540651 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3209.

The product of its (nonzero) digits is 4800, while the sum is 31.

The square root of 1081540651 is about 32886.7853552152. The cubic root of 1081540651 is about 1026.4732021589.

The spelling of 1081540651 in words is "one billion, eighty-one million, five hundred forty thousand, six hundred fifty-one".