105646456779 has 8 divisors (see below), whose sum is σ = 140867010960. Its totient is φ = 70428436896.

The previous prime is 105646456753. The next prime is 105646456787. The reversal of 105646456779 is 977654646501.

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

It is not a de Polignac number, because 105646456779 - 2¹³ = 105646448587 is a prime.

It is a super-2 number, since 2×105646456779² (a number of 23 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (105646456079) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 534072 + ... + 704645.

It is an arithmetic number, because the mean of its divisors is an integer number (17608376370).

Almost surely, 2^105646456779 is an apocalyptic number.

105646456779 is a deficient number, since it is larger than the sum of its proper divisors (35220554181).

105646456779 is a wasteful number, since it uses less digits than its factorization.

105646456779 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1267149.

The product of its (nonzero) digits is 38102400, while the sum is 60.

The spelling of 105646456779 in words is "one hundred five billion, six hundred forty-six million, four hundred fifty-six thousand, seven hundred seventy-nine".