77375457378 has 12 divisors (see below), whose sum is σ = 167646824358. Its totient is φ = 25791819120.

The previous prime is 77375457377. The next prime is 77375457421. The reversal of 77375457378 is 87375457377.

77375457378 is a `hidden beast` number, since 7 + 7 + 3 + 7 + 54 + 573 + 7 + 8 = 666.

It can be written as a sum of positive squares in only one way, i.e., 49843688049 + 27531769329 = 223257^2 + 165927^2 .

It is a super-2 number, since 2×77375457378² (a number of 23 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (77375457371) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 2149318243 + ... + 2149318278.

Almost surely, 2^77375457378 is an apocalyptic number.

77375457378 is an abundant number, since it is smaller than the sum of its proper divisors (90271366980).

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

77375457378 is a wasteful number, since it uses less digits than its factorization.

77375457378 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4298636529 (or 4298636526 counting only the distinct ones).

The product of its digits is 121010400, while the sum is 63.

Subtracting 77375457378 from its reverse (87375457377), we obtain a palindrome (9999999999).

The spelling of 77375457378 in words is "seventy-seven billion, three hundred seventy-five million, four hundred fifty-seven thousand, three hundred seventy-eight".