77378576238 has 16 divisors (see below), whose sum is σ = 171952391760. Its totient is φ = 25792858728.

The previous prime is 77378576237. The next prime is 77378576251. The reversal of 77378576238 is 83267587377.

77378576238 is a `hidden beast` number, since 7 + 7 + 37 + 8 + 576 + 23 + 8 = 666.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (77378576237) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 716468245 + ... + 716468352.

It is an arithmetic number, because the mean of its divisors is an integer number (10747024485).

Almost surely, 2^77378576238 is an apocalyptic number.

77378576238 is an abundant number, since it is smaller than the sum of its proper divisors (94573815522).

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

77378576238 is a wasteful number, since it uses less digits than its factorization.

77378576238 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1432936608 (or 1432936602 counting only the distinct ones).

The product of its digits is 82978560, while the sum is 63.

The spelling of 77378576238 in words is "seventy-seven billion, three hundred seventy-eight million, five hundred seventy-six thousand, two hundred thirty-eight".