87856684413 has 4 divisors (see below), whose sum is σ = 117142245888. Its totient is φ = 58571122940.

The previous prime is 87856684411. The next prime is 87856684427. The reversal of 87856684413 is 31448665878.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 87856684413 - 2¹ = 87856684411 is a prime.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (87856684411) 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, 14642780733 + ... + 14642780738.

It is an arithmetic number, because the mean of its divisors is an integer number (29285561472).

Almost surely, 2^87856684413 is an apocalyptic number.

It is an amenable number.

87856684413 is a deficient number, since it is larger than the sum of its proper divisors (29285561475).

87856684413 is a wasteful number, since it uses less digits than its factorization.

87856684413 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 29285561474.

The product of its digits is 30965760, while the sum is 60.

The spelling of 87856684413 in words is "eighty-seven billion, eight hundred fifty-six million, six hundred eighty-four thousand, four hundred thirteen".