1640074147 has 8 divisors (see below), whose sum is σ = 1645113456. Its totient is φ = 1635043872.

The previous prime is 1640074109. The next prime is 1640074151. The reversal of 1640074147 is 7414700461.

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 1640074147 - 2¹¹ = 1640072099 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1640074187) 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, 538513 + ... + 541549.

It is an arithmetic number, because the mean of its divisors is an integer number (205639182).

Almost surely, 2^1640074147 is an apocalyptic number.

1640074147 is a deficient number, since it is larger than the sum of its proper divisors (5039309).

1640074147 is an equidigital number, since it uses as much as digits as its factorization.

1640074147 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4517.

The product of its (nonzero) digits is 18816, while the sum is 34.

The square root of 1640074147 is about 40497.8289171160. The cubic root of 1640074147 is about 1179.2914800042.

The spelling of 1640074147 in words is "one billion, six hundred forty million, seventy-four thousand, one hundred forty-seven".