10161640 has 16 divisors (see below), whose sum is σ = 22863780. Its totient is φ = 4064640.

The previous prime is 10161611. The next prime is 10161647. The reversal of 10161640 is 4616101.

It is a happy number.

10161640 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in 2 ways, for example, as 9205156 + 956484 = 3034^2 + 978^2 .

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (10161647) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 126981 + ... + 127060.

Almost surely, 2^10161640 is an apocalyptic number.

10161640 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

10161640 is an abundant number, since it is smaller than the sum of its proper divisors (12702140).

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

10161640 is a wasteful number, since it uses less digits than its factorization.

10161640 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 254052 (or 254048 counting only the distinct ones).

The product of its (nonzero) digits is 144, while the sum is 19.

The square root of 10161640 is about 3187.7327366014. The cubic root of 10161640 is about 216.5980795398.

Adding to 10161640 its reverse (4616101), we get a palindrome (14777741).

It can be divided in two parts, 10161 and 640, that added together give a palindrome (10801).

The spelling of 10161640 in words is "ten million, one hundred sixty-one thousand, six hundred forty".