1640360827 has 16 divisors (see below), whose sum is σ = 1889847232. Its totient is φ = 1394703360.

The previous prime is 1640360803. The next prime is 1640360831. The reversal of 1640360827 is 7280630461.

It is a cyclic number.

It is not a de Polignac number, because 1640360827 - 2¹¹ = 1640358779 is a prime.

It is a super-2 number, since 2×1640360827² = 5381567285512247858, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (1640360327) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 577603 + ... + 580435.

It is an arithmetic number, because the mean of its divisors is an integer number (118115452).

Almost surely, 2^1640360827 is an apocalyptic number.

1640360827 is a deficient number, since it is larger than the sum of its proper divisors (249486405).

1640360827 is a wasteful number, since it uses less digits than its factorization.

1640360827 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3478.

The product of its (nonzero) digits is 48384, while the sum is 37.

The square root of 1640360827 is about 40501.3682114568. The cubic root of 1640360827 is about 1179.3601881956.

The spelling of 1640360827 in words is "one billion, six hundred forty million, three hundred sixty thousand, eight hundred twenty-seven".