987878404785 has 32 divisors (see below), whose sum is σ = 1583428492800. Its totient is φ = 525928320000.

The previous prime is 987878404781. The next prime is 987878404831. The reversal of 987878404785 is 587404878789.

It is not a de Polignac number, because 987878404785 - 2² = 987878404781 is a prime.

It is not an unprimeable number, because it can be changed into a prime (987878404781) 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, 19344285 + ... + 19395285.

It is an arithmetic number, because the mean of its divisors is an integer number (49482140400).

Almost surely, 2^987878404785 is an apocalyptic number.

It is an amenable number.

987878404785 is a deficient number, since it is larger than the sum of its proper divisors (595550088015).

987878404785 is a wasteful number, since it uses less digits than its factorization.

987878404785 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 53289.

The product of its (nonzero) digits is 1011548160, while the sum is 75.

The spelling of 987878404785 in words is "nine hundred eighty-seven billion, eight hundred seventy-eight million, four hundred four thousand, seven hundred eighty-five".