78855081285 has 32 divisors (see below), whose sum is σ = 131917824000. Its totient is φ = 40146815808.

The previous prime is 78855081209. The next prime is 78855081287. The reversal of 78855081285 is 58218055887.

It is not a de Polignac number, because 78855081285 - 2¹³ = 78855073093 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (78855081287) 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, 56869 + ... + 401178.

It is an arithmetic number, because the mean of its divisors is an integer number (4122432000).

Almost surely, 2^78855081285 is an apocalyptic number.

It is an amenable number.

78855081285 is a deficient number, since it is larger than the sum of its proper divisors (53062742715).

78855081285 is a wasteful number, since it uses less digits than its factorization.

78855081285 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 458577.

The product of its (nonzero) digits is 7168000, while the sum is 57.

The spelling of 78855081285 in words is "seventy-eight billion, eight hundred fifty-five million, eighty-one thousand, two hundred eighty-five".