787117855878 has 12 divisors (see below), whose sum is σ = 1705422021108. Its totient is φ = 262372618620.

The previous prime is 787117855871. The next prime is 787117855891. The reversal of 787117855878 is 878558711787.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (787117855871) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 21864384868 + ... + 21864384903.

It is an arithmetic number, because the mean of its divisors is an integer number (142118501759).

Almost surely, 2^787117855878 is an apocalyptic number.

787117855878 is an abundant number, since it is smaller than the sum of its proper divisors (918304165230).

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

787117855878 is a wasteful number, since it uses less digits than its factorization.

787117855878 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 43728769779 (or 43728769776 counting only the distinct ones).

The product of its digits is 245862400, while the sum is 72.

The spelling of 787117855878 in words is "seven hundred eighty-seven billion, one hundred seventeen million, eight hundred fifty-five thousand, eight hundred seventy-eight".