87856781356 has 12 divisors (see below), whose sum is σ = 161841439480. Its totient is φ = 41616370080.

The previous prime is 87856781329. The next prime is 87856781393. The reversal of 87856781356 is 65318765878.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 578005065 + ... + 578005216.

Almost surely, 2^87856781356 is an apocalyptic number.

It is an amenable number.

87856781356 is a deficient number, since it is larger than the sum of its proper divisors (73984658124).

87856781356 is a wasteful number, since it uses less digits than its factorization.

87856781356 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1156010304 (or 1156010302 counting only the distinct ones).

The product of its digits is 67737600, while the sum is 64.

The spelling of 87856781356 in words is "eighty-seven billion, eight hundred fifty-six million, seven hundred eighty-one thousand, three hundred fifty-six".