1640410256 has 10 divisors (see below), whose sum is σ = 3178294902. Its totient is φ = 820205120.

The previous prime is 1640410253. The next prime is 1640410333. The reversal of 1640410256 is 6520140461.

It can be written as a sum of positive squares in only one way, i.e., 1068243856 + 572166400 = 32684^2 + 23920^2 .

It is not an unprimeable number, because it can be changed into a prime (1640410253) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 51262805 + ... + 51262836.

Almost surely, 2^1640410256 is an apocalyptic number.

1640410256 is a gapful number since it is divisible by the number (16) formed by its first and last digit.

It is an amenable number.

1640410256 is a deficient number, since it is larger than the sum of its proper divisors (1537884646).

1640410256 is a wasteful number, since it uses less digits than its factorization.

1640410256 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 102525649 (or 102525643 counting only the distinct ones).

The product of its (nonzero) digits is 5760, while the sum is 29.

The square root of 1640410256 is about 40501.9784208130. The cubic root of 1640410256 is about 1179.3720339652.

The spelling of 1640410256 in words is "one billion, six hundred forty million, four hundred ten thousand, two hundred fifty-six".