1640523241 has 8 divisors (see below), whose sum is σ = 1881558144. Its totient is φ = 1401156960.

The previous prime is 1640523221. The next prime is 1640523299. The reversal of 1640523241 is 1423250461.

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

It is not a de Polignac number, because 1640523241 - 2¹⁹ = 1639998953 is a prime.

It is a super-2 number, since 2×1640523241² = 5382633008522288162, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1640523211) 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, 415045 + ... + 418978.

It is an arithmetic number, because the mean of its divisors is an integer number (235194768).

Almost surely, 2^1640523241 is an apocalyptic number.

It is an amenable number.

1640523241 is a deficient number, since it is larger than the sum of its proper divisors (241034903).

1640523241 is an equidigital number, since it uses as much as digits as its factorization.

1640523241 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 834311.

The product of its (nonzero) digits is 5760, while the sum is 28.

The square root of 1640523241 is about 40503.3732052035. The cubic root of 1640523241 is about 1179.3991101777.

The spelling of 1640523241 in words is "one billion, six hundred forty million, five hundred twenty-three thousand, two hundred forty-one".