87528513261 has 12 divisors (see below), whose sum is σ = 135758510592. Its totient is φ = 50016293208.

The previous prime is 87528513253. The next prime is 87528513263. The reversal of 87528513261 is 16231582578.

It is not a de Polignac number, because 87528513261 - 2³ = 87528513253 is a prime.

It is a super-2 number, since 2×87528513261² (a number of 23 digits) contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 87528513261.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (87528513263) by changing a digit.

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 in 11 ways as a sum of consecutive naturals, for example, 297715885 + ... + 297716178.

It is an arithmetic number, because the mean of its divisors is an integer number (11313209216).

Almost surely, 2^87528513261 is an apocalyptic number.

It is an amenable number.

87528513261 is a deficient number, since it is larger than the sum of its proper divisors (48229997331).

87528513261 is a wasteful number, since it uses less digits than its factorization.

87528513261 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 595432080 (or 595432073 counting only the distinct ones).

The product of its digits is 806400, while the sum is 48.

The spelling of 87528513261 in words is "eighty-seven billion, five hundred twenty-eight million, five hundred thirteen thousand, two hundred sixty-one".