87561939628 has 24 divisors (see below), whose sum is σ = 154207845792. Its totient is φ = 43503329664.

The previous prime is 87561939587. The next prime is 87561939667. The reversal of 87561939628 is 82693916578.

It is a self number, because there is not a number n which added to its sum of digits gives 87561939628.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 357426 + ... + 550342.

It is an arithmetic number, because the mean of its divisors is an integer number (6425326908).

Almost surely, 2^87561939628 is an apocalyptic number.

It is an amenable number.

87561939628 is a deficient number, since it is larger than the sum of its proper divisors (66645906164).

87561939628 is a wasteful number, since it uses less digits than its factorization.

87561939628 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 193641 (or 193639 counting only the distinct ones).

The product of its digits is 39191040, while the sum is 64.

The spelling of 87561939628 in words is "eighty-seven billion, five hundred sixty-one million, nine hundred thirty-nine thousand, six hundred twenty-eight".