78857252880 has 160 divisors (see below), whose sum is σ = 282146727168. Its totient is φ = 17846016000.

The previous prime is 78857252863. The next prime is 78857252897. The reversal of 78857252880 is 8825275887.

It is an interprime number because it is at equal distance from previous prime (78857252863) and next prime (78857252897).

It is a Harshad number since it is a multiple of its sum of digits (60).

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 62691 + ... + 402050.

Almost surely, 2^78857252880 is an apocalyptic number.

78857252880 is a gapful number since it is divisible by the number (70) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 78857252880, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (141073363584).

78857252880 is an abundant number, since it is smaller than the sum of its proper divisors (203289474288).

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

78857252880 is a wasteful number, since it uses less digits than its factorization.

78857252880 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 464865 (or 464859 counting only the distinct ones).

The product of its (nonzero) digits is 20070400, while the sum is 60.

The spelling of 78857252880 in words is "seventy-eight billion, eight hundred fifty-seven million, two hundred fifty-two thousand, eight hundred eighty".