87781492744 has 32 divisors (see below), whose sum is σ = 181825891200. Its totient is φ = 39395603520.

The previous prime is 87781492717. The next prime is 87781492769. The reversal of 87781492744 is 44729418778.

It is a happy number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 6306447 + ... + 6320350.

It is an arithmetic number, because the mean of its divisors is an integer number (5682059100).

Almost surely, 2^87781492744 is an apocalyptic number.

It is an amenable number.

87781492744 is an abundant number, since it is smaller than the sum of its proper divisors (94044398456).

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

87781492744 is a wasteful number, since it uses less digits than its factorization.

87781492744 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 12626893 (or 12626889 counting only the distinct ones).

The product of its digits is 25288704, while the sum is 61.

The spelling of 87781492744 in words is "eighty-seven billion, seven hundred eighty-one million, four hundred ninety-two thousand, seven hundred forty-four".