87139497635 has 32 divisors (see below), whose sum is σ = 107793531648. Its totient is φ = 67586037120.

The previous prime is 87139497629. The next prime is 87139497637. The reversal of 87139497635 is 53679493178.

It is a Cunningham number, because it is equal to 295194²-1.

It is not a de Polignac number, because 87139497635 - 2⁴ = 87139497619 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (87139497637) 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, 48115880 + ... + 48117690.

It is an arithmetic number, because the mean of its divisors is an integer number (3368547864).

Almost surely, 2^87139497635 is an apocalyptic number.

87139497635 is a deficient number, since it is larger than the sum of its proper divisors (20654034013).

87139497635 is a wasteful number, since it uses less digits than its factorization.

87139497635 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3395.

The product of its digits is 34292160, while the sum is 62.

The spelling of 87139497635 in words is "eighty-seven billion, one hundred thirty-nine million, four hundred ninety-seven thousand, six hundred thirty-five".