1640413461 has 8 divisors (see below), whose sum is σ = 2219863264. Its totient is φ = 1077286320.

The previous prime is 1640413421. The next prime is 1640413471. The reversal of 1640413461 is 1643140461.

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

It is a de Polignac number, because none of the positive numbers 2^k-1640413461 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1640413421) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 4080430 + ... + 4080831.

It is an arithmetic number, because the mean of its divisors is an integer number (277482908).

Almost surely, 2^1640413461 is an apocalyptic number.

It is an amenable number.

1640413461 is a deficient number, since it is larger than the sum of its proper divisors (579449803).

1640413461 is an equidigital number, since it uses as much as digits as its factorization.

1640413461 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8161331.

The product of its (nonzero) digits is 6912, while the sum is 30.

The square root of 1640413461 is about 40502.0179867621. The cubic root of 1640413461 is about 1179.3728020423.

The spelling of 1640413461 in words is "one billion, six hundred forty million, four hundred thirteen thousand, four hundred sixty-one".