87389756455145 has 4 divisors (see below), whose sum is σ = 104867707746180. Its totient is φ = 69911805164112.

The previous prime is 87389756455103. The next prime is 87389756455153. The reversal of 87389756455145 is 54155465798378.

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

It can be written as a sum of positive squares in 2 ways, for example, as 68554607812441 + 18835148642704 = 8279771^2 + 4339948^2 .

It is a cyclic number.

It is not a de Polignac number, because 87389756455145 - 2⁴⁶ = 17021012277481 is a prime.

It is a Curzon number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 8738975645510 + ... + 8738975645519.

It is an arithmetic number, because the mean of its divisors is an integer number (26216926936545).

Almost surely, 2^{87389756455145} is an apocalyptic number.

It is an amenable number.

87389756455145 is a deficient number, since it is larger than the sum of its proper divisors (17477951291035).

87389756455145 is a wasteful number, since it uses less digits than its factorization.

87389756455145 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 17477951291034.

The product of its digits is 5080320000, while the sum is 77.

The spelling of 87389756455145 in words is "eighty-seven trillion, three hundred eighty-nine billion, seven hundred fifty-six million, four hundred fifty-five thousand, one hundred forty-five".