106778016191 has 64 divisors (see below), whose sum is σ = 142544240640. Its totient is φ = 77474880000.

The previous prime is 106778016157. The next prime is 106778016251. The reversal of 106778016191 is 191610877601.

It is a happy number.

It is not a de Polignac number, because 106778016191 - 2¹⁸ = 106777754047 is a prime.

It is a super-2 number, since 2×106778016191² (a number of 23 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (106778016091) by changing a digit.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 38119991 + ... + 38122791.

It is an arithmetic number, because the mean of its divisors is an integer number (2227253760).

Almost surely, 2^106778016191 is an apocalyptic number.

106778016191 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

106778016191 is a deficient number, since it is larger than the sum of its proper divisors (35766224449).

106778016191 is a wasteful number, since it uses less digits than its factorization.

106778016191 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3276.

The product of its (nonzero) digits is 127008, while the sum is 47.

The spelling of 106778016191 in words is "one hundred six billion, seven hundred seventy-eight million, sixteen thousand, one hundred ninety-one".