87195945785 has 32 divisors (see below), whose sum is σ = 115488670752. Its totient is φ = 62789713920.

The previous prime is 87195945761. The next prime is 87195945787. The reversal of 87195945785 is 58754959178.

It can be written as a sum of positive squares in 16 ways, for example, as 8342812921 + 78853132864 = 91339^2 + 280808^2 .

It is not a de Polignac number, because 87195945785 - 2¹² = 87195941689 is a prime.

It is a super-2 number, since 2×87195945785² (a number of 23 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (87195945787) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 6434537 + ... + 6448073.

It is an arithmetic number, because the mean of its divisors is an integer number (3609020961).

Almost surely, 2^87195945785 is an apocalyptic number.

It is an amenable number.

87195945785 is a deficient number, since it is larger than the sum of its proper divisors (28292724967).

87195945785 is a wasteful number, since it uses less digits than its factorization.

87195945785 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 16013.

The product of its digits is 127008000, while the sum is 68.

The spelling of 87195945785 in words is "eighty-seven billion, one hundred ninety-five million, nine hundred forty-five thousand, seven hundred eighty-five".