87680812525 has 6 divisors (see below), whose sum is σ = 108724207562. Its totient is φ = 70144650000.

The previous prime is 87680812519. The next prime is 87680812529. The reversal of 87680812525 is 52521808678.

It can be written as a sum of positive squares in 3 ways, for example, as 482856676 + 87197955849 = 21974^2 + 295293^2 .

It is a de Polignac number, because none of the positive numbers 2^k-87680812525 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (87680812529) 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 5 ways as a sum of consecutive naturals, for example, 1753616226 + ... + 1753616275.

Almost surely, 2^87680812525 is an apocalyptic number.

It is an amenable number.

87680812525 is a deficient number, since it is larger than the sum of its proper divisors (21043395037).

87680812525 is a wasteful number, since it uses less digits than its factorization.

87680812525 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3507232511 (or 3507232506 counting only the distinct ones).

The product of its (nonzero) digits is 2150400, while the sum is 52.

The spelling of 87680812525 in words is "eighty-seven billion, six hundred eighty million, eight hundred twelve thousand, five hundred twenty-five".