77838168373438 has 32 divisors (see below), whose sum is σ = 127621014757632. Its totient is φ = 35311731235200.

The previous prime is 77838168373391. The next prime is 77838168373453. The reversal of 77838168373438 is 83437386183877.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 36200470 + ... + 38290342.

It is an arithmetic number, because the mean of its divisors is an integer number (3988156711176).

Almost surely, 2^{77838168373438} is an apocalyptic number.

77838168373438 is a deficient number, since it is larger than the sum of its proper divisors (49782846384194).

77838168373438 is a wasteful number, since it uses less digits than its factorization.

77838168373438 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2093200.

The product of its digits is 2731180032, while the sum is 76.

The spelling of 77838168373438 in words is "seventy-seven trillion, eight hundred thirty-eight billion, one hundred sixty-eight million, three hundred seventy-three thousand, four hundred thirty-eight".