9877777423206 has 256 divisors, whose sum is σ = 26578840780800. Its totient is φ = 2369566310400.

The previous prime is 9877777423181. The next prime is 9877777423207. The reversal of 9877777423206 is 6023247777789.

It is a super-3 number, since 3×9877777423206³ (a number of 40 digits) contains 333 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (9877777423207) by changing a digit.

It is a polite number, since it can be written in 127 ways as a sum of consecutive naturals, for example, 517883686 + ... + 517902758.

It is an arithmetic number, because the mean of its divisors is an integer number (103823596800).

Almost surely, 2^{9877777423206} is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 9877777423206, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (13289420390400).

9877777423206 is an abundant number, since it is smaller than the sum of its proper divisors (16701063357594).

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

9877777423206 is a wasteful number, since it uses less digits than its factorization.

9877777423206 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 20595.

The product of its (nonzero) digits is 348509952, while the sum is 69.

The spelling of 9877777423206 in words is "nine trillion, eight hundred seventy-seven billion, seven hundred seventy-seven million, four hundred twenty-three thousand, two hundred six".