87613778508833 has 4 divisors (see below), whose sum is σ = 87621091247508. Its totient is φ = 87606465770160.

The previous prime is 87613778508749. The next prime is 87613778508869. The reversal of 87613778508833 is 33880587731678.

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 73000414464784 + 14613364044049 = 8544028^2 + 3822743^2 .

It is a cyclic number.

It is not a de Polignac number, because 87613778508833 - 2¹² = 87613778504737 is a prime.

It is a super-2 number, since 2×87613778508833² (a number of 29 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (87613778808833) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3656351366 + ... + 3656375327.

It is an arithmetic number, because the mean of its divisors is an integer number (21905272811877).

Almost surely, 2^{87613778508833} is an apocalyptic number.

It is an amenable number.

87613778508833 is a deficient number, since it is larger than the sum of its proper divisors (7312738675).

87613778508833 is a wasteful number, since it uses less digits than its factorization.

87613778508833 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7312738674.

The product of its (nonzero) digits is 1137991680, while the sum is 74.

The spelling of 87613778508833 in words is "eighty-seven trillion, six hundred thirteen billion, seven hundred seventy-eight million, five hundred eight thousand, eight hundred thirty-three".