1640152641 has 8 divisors (see below), whose sum is σ = 2187289600. Its totient is φ = 1093225392.

The previous prime is 1640152607. The next prime is 1640152651. The reversal of 1640152641 is 1462510461.

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

It is not a de Polignac number, because 1640152641 - 2⁷ = 1640152513 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 1640152599 and 1640152608.

It is not an unprimeable number, because it can be changed into a prime (1640152651) 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, 33166 + ... + 66183.

It is an arithmetic number, because the mean of its divisors is an integer number (273411200).

Almost surely, 2^1640152641 is an apocalyptic number.

It is an amenable number.

1640152641 is a deficient number, since it is larger than the sum of its proper divisors (547136959).

1640152641 is an equidigital number, since it uses as much as digits as its factorization.

1640152641 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 104855.

The product of its (nonzero) digits is 5760, while the sum is 30.

The square root of 1640152641 is about 40498.7980192005. The cubic root of 1640152641 is about 1179.3102933465.

The spelling of 1640152641 in words is "one billion, six hundred forty million, one hundred fifty-two thousand, six hundred forty-one".