78871803572977 has 32 divisors (see below), whose sum is σ = 83268318309120. Its totient is φ = 74558195712000.

The previous prime is 78871803572879. The next prime is 78871803573041. The reversal of 78871803572977 is 77927530817887.

It is a cyclic number.

It is not a de Polignac number, because 78871803572977 - 2²⁷ = 78871669355249 is a prime.

It is a super-3 number, since 3×78871803572977³ (a number of 43 digits) contains 333 as substring. Note that it is a super-d number also for d = 2.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 78871803572897 and 78871803572906.

It is not an unprimeable number, because it can be changed into a prime (78871803542977) 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, 5489018049 + ... + 5489032417.

It is an arithmetic number, because the mean of its divisors is an integer number (2602134947160).

Almost surely, 2^{78871803572977} is an apocalyptic number.

It is an amenable number.

78871803572977 is a deficient number, since it is larger than the sum of its proper divisors (4396514736143).

78871803572977 is a wasteful number, since it uses less digits than its factorization.

78871803572977 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 17833.

The product of its (nonzero) digits is 2323399680, while the sum is 79.

The spelling of 78871803572977 in words is "seventy-eight trillion, eight hundred seventy-one billion, eight hundred three million, five hundred seventy-two thousand, nine hundred seventy-seven".