77743844355378 has 64 divisors (see below), whose sum is σ = 170789413939200. Its totient is φ = 23482988559360.

The previous prime is 77743844355377. The next prime is 77743844355451. The reversal of 77743844355378 is 87355344834777.

It is a super-3 number, since 3×77743844355378³ (a number of 43 digits) contains 333 as substring.

It is not an unprimeable number, because it can be changed into a prime (77743844355377) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 371592763 + ... + 371801921.

It is an arithmetic number, because the mean of its divisors is an integer number (2668584592800).

Almost surely, 2^{77743844355378} is an apocalyptic number.

77743844355378 is an abundant number, since it is smaller than the sum of its proper divisors (93045569583822).

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

77743844355378 is a wasteful number, since it uses less digits than its factorization.

77743844355378 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 350967.

The product of its digits is 6638284800, while the sum is 75.

The spelling of 77743844355378 in words is "seventy-seven trillion, seven hundred forty-three billion, eight hundred forty-four million, three hundred fifty-five thousand, three hundred seventy-eight".