6172277778381 has 64 divisors (see below), whose sum is σ = 9725864069376. Its totient is φ = 3432537907200.

The previous prime is 6172277778379. The next prime is 6172277778383. The reversal of 6172277778381 is 1838777722716.

It is an interprime number because it is at equal distance from previous prime (6172277778379) and next prime (6172277778383).

It is not a de Polignac number, because 6172277778381 - 2¹ = 6172277778379 is a prime.

It is a super-4 number, since 4×6172277778381⁴ (a number of 52 digits) contains 4444 as substring. Note that it is a super-d number also for d = 2.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (6172277778383) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 206298435 + ... + 206328351.

It is an arithmetic number, because the mean of its divisors is an integer number (151966626084).

Almost surely, 2^{6172277778381} is an apocalyptic number.

It is an amenable number.

6172277778381 is a deficient number, since it is larger than the sum of its proper divisors (3553586290995).

6172277778381 is a wasteful number, since it uses less digits than its factorization.

6172277778381 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 32782.

The product of its digits is 77446656, while the sum is 66.

The spelling of 6172277778381 in words is "six trillion, one hundred seventy-two billion, two hundred seventy-seven million, seven hundred seventy-eight thousand, three hundred eighty-one".