78177235720255 has 8 divisors (see below), whose sum is σ = 107214494702112. Its totient is φ = 53607247351008.

The previous prime is 78177235720211. The next prime is 78177235720277. The reversal of 78177235720255 is 55202753277187.

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

It is a cyclic number.

It is not a de Polignac number, because 78177235720255 - 2⁷ = 78177235720127 is a prime.

It is a super-3 number, since 3×78177235720255³ (a number of 43 digits) contains 333 as substring. Note that it is a super-d number also for d = 2.

It is a junction number, because it is equal to n+sod(n) for n = 78177235720193 and 78177235720202.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1116817653112 + ... + 1116817653181.

It is an arithmetic number, because the mean of its divisors is an integer number (13401811837764).

Almost surely, 2^{78177235720255} is an apocalyptic number.

78177235720255 is a deficient number, since it is larger than the sum of its proper divisors (29037258981857).

78177235720255 is a wasteful number, since it uses less digits than its factorization.

78177235720255 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2233635306305.

The product of its (nonzero) digits is 57624000, while the sum is 61.

The spelling of 78177235720255 in words is "seventy-eight trillion, one hundred seventy-seven billion, two hundred thirty-five million, seven hundred twenty thousand, two hundred fifty-five".