87628503532861 has 4 divisors (see below), whose sum is σ = 89065036377724. Its totient is φ = 86191970688000.

The previous prime is 87628503532793. The next prime is 87628503532873. The reversal of 87628503532861 is 16823530582678.

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 8192389195225 + 79436114337636 = 2862235^2 + 8912694^2 .

It is a cyclic number.

It is not a de Polignac number, because 87628503532861 - 2³⁹ = 87078747718973 is a prime.

It is a super-3 number, since 3×87628503532861³ (a number of 43 digits) contains 333 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 87628503532793 and 87628503532802.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (87628503542861) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 718266422340 + ... + 718266422461.

It is an arithmetic number, because the mean of its divisors is an integer number (22266259094431).

Almost surely, 2^{87628503532861} is an apocalyptic number.

It is an amenable number.

87628503532861 is a deficient number, since it is larger than the sum of its proper divisors (1436532844863).

87628503532861 is a wasteful number, since it uses less digits than its factorization.

87628503532861 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1436532844862.

The product of its (nonzero) digits is 116121600, while the sum is 64.

The spelling of 87628503532861 in words is "eighty-seven trillion, six hundred twenty-eight billion, five hundred three million, five hundred thirty-two thousand, eight hundred sixty-one".