87205257772 has 24 divisors (see below), whose sum is σ = 154324563120. Its totient is φ = 43113354240.

The previous prime is 87205257739. The next prime is 87205257859. The reversal of 87205257772 is 27775250278.

It is an unprimeable number.

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 in 7 ways as a sum of consecutive naturals, for example, 320304 + ... + 526312.

It is an arithmetic number, because the mean of its divisors is an integer number (6430190130).

Almost surely, 2^87205257772 is an apocalyptic number.

It is an amenable number.

87205257772 is a deficient number, since it is larger than the sum of its proper divisors (67119305348).

87205257772 is a wasteful number, since it uses less digits than its factorization.

87205257772 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 207201 (or 207199 counting only the distinct ones).

The product of its (nonzero) digits is 3841600, while the sum is 52.

The spelling of 87205257772 in words is "eighty-seven billion, two hundred five million, two hundred fifty-seven thousand, seven hundred seventy-two".