7777057768381 has 16 divisors (see below), whose sum is σ = 8765651980800. Its totient is φ = 6838587670320.

The previous prime is 7777057768357. The next prime is 7777057768429. The reversal of 7777057768381 is 1838677507777.

It is a cyclic number.

It is not a de Polignac number, because 7777057768381 - 2²³ = 7777049379773 is a prime.

It is a super-2 number, since 2×7777057768381² (a number of 27 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (7777057768351) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 79766731 + ... + 79864168.

It is an arithmetic number, because the mean of its divisors is an integer number (547853248800).

Almost surely, 2^{7777057768381} is an apocalyptic number.

It is an amenable number.

7777057768381 is a deficient number, since it is larger than the sum of its proper divisors (988594212419).

7777057768381 is a wasteful number, since it uses less digits than its factorization.

7777057768381 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 159631056.

The product of its (nonzero) digits is 677658240, while the sum is 73.

The spelling of 7777057768381 in words is "seven trillion, seven hundred seventy-seven billion, fifty-seven million, seven hundred sixty-eight thousand, three hundred eighty-one".