87898774655 has 4 divisors (see below), whose sum is σ = 105478529592. Its totient is φ = 70319019720.

The previous prime is 87898774637. The next prime is 87898774657. The reversal of 87898774655 is 55647789878.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 55647789878 = 2 ⋅27823894939.

It is not a de Polignac number, because 87898774655 - 2³⁴ = 70718905471 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 (87898774657) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 8789877461 + ... + 8789877470.

It is an arithmetic number, because the mean of its divisors is an integer number (26369632398).

Almost surely, 2^87898774655 is an apocalyptic number.

87898774655 is a deficient number, since it is larger than the sum of its proper divisors (17579754937).

87898774655 is a wasteful number, since it uses less digits than its factorization.

87898774655 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 17579754936.

The product of its digits is 948326400, while the sum is 74.

The spelling of 87898774655 in words is "eighty-seven billion, eight hundred ninety-eight million, seven hundred seventy-four thousand, six hundred fifty-five".