87847771078 has 4 divisors (see below), whose sum is σ = 131771656620. Its totient is φ = 43923885538.

The previous prime is 87847771073. The next prime is 87847771127. The reversal of 87847771078 is 87017774878.

It is a semiprime because it is the product of two primes.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (87847771073) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 21961942768 + ... + 21961942771.

It is an arithmetic number, because the mean of its divisors is an integer number (32942914155).

Almost surely, 2^87847771078 is an apocalyptic number.

87847771078 is a deficient number, since it is larger than the sum of its proper divisors (43923885542).

87847771078 is a wasteful number, since it uses less digits than its factorization.

87847771078 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 43923885541.

The product of its (nonzero) digits is 34420736, while the sum is 64.

The spelling of 87847771078 in words is "eighty-seven billion, eight hundred forty-seven million, seven hundred seventy-one thousand, seventy-eight".