1640335112 has 32 divisors (see below), whose sum is σ = 3357603480. Its totient is φ = 746703360.

The previous prime is 1640335069. The next prime is 1640335121. The reversal of 1640335112 is 2115330461.

It can be written as a sum of positive squares in 4 ways, for example, as 1036453636 + 603881476 = 32194^2 + 24574^2 .

It is a Harshad number since it is a multiple of its sum of digits (26).

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 100439 + ... + 115622.

Almost surely, 2^1640335112 is an apocalyptic number.

It is an amenable number.

1640335112 is an abundant number, since it is smaller than the sum of its proper divisors (1717268368).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

1640335112 is a wasteful number, since it uses less digits than its factorization.

1640335112 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 216153 (or 216149 counting only the distinct ones).

The product of its (nonzero) digits is 2160, while the sum is 26.

The square root of 1640335112 is about 40501.0507518015. The cubic root of 1640335112 is about 1179.3540254446.

Adding to 1640335112 its reverse (2115330461), we get a palindrome (3755665573).

It can be divided in two parts, 16403 and 35112, that added together give a palindrome (51515).

The spelling of 1640335112 in words is "one billion, six hundred forty million, three hundred thirty-five thousand, one hundred twelve".