77857488188338 has 8 divisors (see below), whose sum is σ = 116788150483740. Its totient is φ = 38928104693760.

The previous prime is 77857488188329. The next prime is 77857488188339. The reversal of 77857488188338 is 83388188475877.

It can be written as a sum of positive squares in 2 ways, for example, as 77282858998489 + 574629189849 = 8791067^2 + 758043^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is not an unprimeable number, because it can be changed into a prime (77857488188339) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 319547983 + ... + 319791538.

Almost surely, 2^{77857488188338} is an apocalyptic number.

77857488188338 is a deficient number, since it is larger than the sum of its proper divisors (38930662295402).

77857488188338 is a wasteful number, since it uses less digits than its factorization.

77857488188338 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 639400412.

The product of its digits is 16184770560, while the sum is 85.

The spelling of 77857488188338 in words is "seventy-seven trillion, eight hundred fifty-seven billion, four hundred eighty-eight million, one hundred eighty-eight thousand, three hundred thirty-eight".