87215929005853 has 4 divisors (see below), whose sum is σ = 87216274693948. Its totient is φ = 87215583317760.

The previous prime is 87215929005769. The next prime is 87215929005893. The reversal of 87215929005853 is 35850092951278.

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 60328821068569 + 26887107937284 = 7767163^2 + 5185278^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-87215929005853 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 (87215929005893) 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, 172465326 + ... + 172970287.

It is an arithmetic number, because the mean of its divisors is an integer number (21804068673487).

Almost surely, 2^{87215929005853} is an apocalyptic number.

It is an amenable number.

87215929005853 is a deficient number, since it is larger than the sum of its proper divisors (345688095).

87215929005853 is a wasteful number, since it uses less digits than its factorization.

87215929005853 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 345688094.

The product of its (nonzero) digits is 54432000, while the sum is 64.

The spelling of 87215929005853 in words is "eighty-seven trillion, two hundred fifteen billion, nine hundred twenty-nine million, five thousand, eight hundred fifty-three".