105640212687 has 8 divisors (see below), whose sum is σ = 140899644720. Its totient is φ = 70403794560.

The previous prime is 105640212683. The next prime is 105640212749. The reversal of 105640212687 is 786212046501.

It is a happy number.

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

It is not a de Polignac number, because 105640212687 - 2² = 105640212683 is a prime.

It is a super-2 number, since 2×105640212687² (a number of 23 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (105640212683) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 5742762 + ... + 5761127.

It is an arithmetic number, because the mean of its divisors is an integer number (17612455590).

Almost surely, 2^105640212687 is an apocalyptic number.

105640212687 is a deficient number, since it is larger than the sum of its proper divisors (35259432033).

105640212687 is a wasteful number, since it uses less digits than its factorization.

105640212687 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 11506953.

The product of its (nonzero) digits is 161280, while the sum is 42.

The spelling of 105640212687 in words is "one hundred five billion, six hundred forty million, two hundred twelve thousand, six hundred eighty-seven".