101537640 has 96 divisors (see below), whose sum is σ = 344373120. Its totient is φ = 25897344.

The previous prime is 101537621. The next prime is 101537641. The reversal of 101537640 is 46735101.

101537640 is a `hidden beast` number, since 1 + 0 + 15 + 3 + 7 + 640 = 666.

It is not an unprimeable number, because it can be changed into a prime (101537641) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 2149 + ... + 14411.

It is an arithmetic number, because the mean of its divisors is an integer number (3587220).

Almost surely, 2^101537640 is an apocalyptic number.

101537640 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 101537640, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (172186560).

101537640 is an abundant number, since it is smaller than the sum of its proper divisors (242835480).

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

101537640 is a wasteful number, since it uses less digits than its factorization.

101537640 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 12303 (or 12296 counting only the distinct ones).

The product of its (nonzero) digits is 2520, while the sum is 27.

The square root of 101537640 is about 10076.5887084866. The cubic root of 101537640 is about 466.5258237101.

The spelling of 101537640 in words is "one hundred one million, five hundred thirty-seven thousand, six hundred forty".