878717329840 has 80 divisors (see below), whose sum is σ = 2335544354880. Its totient is φ = 301188464640.

The previous prime is 878717329829. The next prime is 878717329871. The reversal of 878717329840 is 48923717878.

It is a tau number, because it is divible by the number of its divisors (80).

It is a super-2 number, since 2×878717329840² (a number of 25 digits) contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1753920 + ... + 2198560.

It is an arithmetic number, because the mean of its divisors is an integer number (29194304436).

Almost surely, 2^878717329840 is an apocalyptic number.

878717329840 is a gapful number since it is divisible by the number (80) formed by its first and last digit.

It is an amenable number.

878717329840 is an abundant number, since it is smaller than the sum of its proper divisors (1456827025040).

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

878717329840 is a wasteful number, since it uses less digits than its factorization.

878717329840 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 448190 (or 448184 counting only the distinct ones).

The product of its (nonzero) digits is 37933056, while the sum is 64.

The spelling of 878717329840 in words is "eight hundred seventy-eight billion, seven hundred seventeen million, three hundred twenty-nine thousand, eight hundred forty".