87389756455172 has 6 divisors (see below), whose sum is σ = 152932073796558. Its totient is φ = 43694878227584.

The previous prime is 87389756455153. The next prime is 87389756455219. The reversal of 87389756455172 is 27155465798378.

It can be written as a sum of positive squares in only one way, i.e., 50474119176196 + 36915637278976 = 7104514^2 + 6075824^2 .

It is a junction number, because it is equal to n+sod(n) for n = 87389756455093 and 87389756455102.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10923719556893 + ... + 10923719556900.

It is an arithmetic number, because the mean of its divisors is an integer number (25488678966093).

Almost surely, 2^{87389756455172} is an apocalyptic number.

It is an amenable number.

87389756455172 is a deficient number, since it is larger than the sum of its proper divisors (65542317341386).

87389756455172 is a wasteful number, since it uses less digits than its factorization.

87389756455172 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 21847439113797 (or 21847439113795 counting only the distinct ones).

The product of its digits is 3556224000, while the sum is 77.

The spelling of 87389756455172 in words is "eighty-seven trillion, three hundred eighty-nine billion, seven hundred fifty-six million, four hundred fifty-five thousand, one hundred seventy-two".