100165640 has 16 divisors (see below), whose sum is σ = 225372780. Its totient is φ = 40066240.

The previous prime is 100165633. The next prime is 100165661. The reversal of 100165640 is 46561001.

It can be written as a sum of positive squares in 2 ways, for example, as 96157636 + 4008004 = 9806^2 + 2002^2 .

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1252031 + ... + 1252110.

Almost surely, 2^100165640 is an apocalyptic number.

100165640 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

100165640 is an abundant number, since it is smaller than the sum of its proper divisors (125207140).

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

100165640 is a wasteful number, since it uses less digits than its factorization.

100165640 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2504152 (or 2504148 counting only the distinct ones).

The product of its (nonzero) digits is 720, while the sum is 23.

The square root of 100165640 is about 10008.2785732612. The cubic root of 100165640 is about 464.4150195834.

The spelling of 100165640 in words is "one hundred million, one hundred sixty-five thousand, six hundred forty".