87197772555562 has 4 divisors (see below), whose sum is σ = 130796658833346. Its totient is φ = 43598886277780.

The previous prime is 87197772555559. The next prime is 87197772555577. The reversal of 87197772555562 is 26555527779178.

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

It can be written as a sum of positive squares in only one way, i.e., 60859517165001 + 26338255390561 = 7801251^2 + 5132081^2 .

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 21799443138889 + ... + 21799443138892.

Almost surely, 2^{87197772555562} is an apocalyptic number.

87197772555562 is a deficient number, since it is larger than the sum of its proper divisors (43598886277784).

87197772555562 is a wasteful number, since it uses less digits than its factorization.

87197772555562 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 43598886277783.

The product of its digits is 2593080000, while the sum is 76.

The spelling of 87197772555562 in words is "eighty-seven trillion, one hundred ninety-seven billion, seven hundred seventy-two million, five hundred fifty-five thousand, five hundred sixty-two".