78177034235388 has 72 divisors (see below), whose sum is σ = 200506851879040. Its totient is φ = 23689630087200.

The previous prime is 78177034235387. The next prime is 78177034235429. The reversal of 78177034235388 is 88353243077187.

78177034235388 is digitally balanced in base 4, because in such base it contains all the possibile digits an equal number of times.

It is a super-3 number, since 3×78177034235388³ (a number of 43 digits) contains 333 as substring. Note that it is a super-d number also for d = 2.

It is a Harshad number since it is a multiple of its sum of digits (66).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (78177034235387) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 97726353 + ... + 98523063.

Almost surely, 2^{78177034235388} is an apocalyptic number.

It is an amenable number.

78177034235388 is an abundant number, since it is smaller than the sum of its proper divisors (122329817643652).

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

78177034235388 is a wasteful number, since it uses less digits than its factorization.

78177034235388 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 864319 (or 864306 counting only the distinct ones).

The product of its (nonzero) digits is 189665280, while the sum is 66.

The spelling of 78177034235388 in words is "seventy-eight trillion, one hundred seventy-seven billion, thirty-four million, two hundred thirty-five thousand, three hundred eighty-eight".