106779850721 has 4 divisors (see below), whose sum is σ = 106783791792. Its totient is φ = 106775909652.

The previous prime is 106779850649. The next prime is 106779850733. The reversal of 106779850721 is 127058977601.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also an emirpimes, since its reverse is a distinct semiprime: 127058977601 = 4643 ⋅27365707.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-106779850721 is a prime.

It is a super-2 number, since 2×106779850721² (a number of 23 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (106779852721) 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, 1929611 + ... + 1984176.

It is an arithmetic number, because the mean of its divisors is an integer number (26695947948).

Almost surely, 2^106779850721 is an apocalyptic number.

It is an amenable number.

106779850721 is a deficient number, since it is larger than the sum of its proper divisors (3941071).

106779850721 is an equidigital number, since it uses as much as digits as its factorization.

106779850721 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3941070.

The product of its (nonzero) digits is 1481760, while the sum is 53.

The spelling of 106779850721 in words is "one hundred six billion, seven hundred seventy-nine million, eight hundred fifty thousand, seven hundred twenty-one".