87138132399 has 32 divisors (see below), whose sum is σ = 132034544640. Its totient is φ = 56772277056.

The previous prime is 87138132391. The next prime is 87138132409. The reversal of 87138132399 is 99323183178.

It is not a de Polignac number, because 87138132399 - 2³ = 87138132391 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (87138132391) 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 31 ways as a sum of consecutive naturals, for example, 816459 + ... + 916995.

It is an arithmetic number, because the mean of its divisors is an integer number (4126079520).

Almost surely, 2^87138132399 is an apocalyptic number.

87138132399 is a deficient number, since it is larger than the sum of its proper divisors (44896412241).

87138132399 is a wasteful number, since it uses less digits than its factorization.

87138132399 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 101276 (or 101270 counting only the distinct ones).

The product of its digits is 1959552, while the sum is 54.

The spelling of 87138132399 in words is "eighty-seven billion, one hundred thirty-eight million, one hundred thirty-two thousand, three hundred ninety-nine".