87768052815886 has 4 divisors (see below), whose sum is σ = 131652079223832. Its totient is φ = 43884026407942.

The previous prime is 87768052815881. The next prime is 87768052815929. The reversal of 87768052815886 is 68851825086778.

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 (87768052815881) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 21942013203970 + ... + 21942013203973.

It is an arithmetic number, because the mean of its divisors is an integer number (32913019805958).

Almost surely, 2^{87768052815886} is an apocalyptic number.

87768052815886 is a deficient number, since it is larger than the sum of its proper divisors (43884026407946).

87768052815886 is a wasteful number, since it uses less digits than its factorization.

87768052815886 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 43884026407945.

The product of its (nonzero) digits is 2890137600, while the sum is 79.

The spelling of 87768052815886 in words is "eighty-seven trillion, seven hundred sixty-eight billion, fifty-two million, eight hundred fifteen thousand, eight hundred eighty-six".