87691822015 has 16 divisors (see below), whose sum is σ = 120284955648. Its totient is φ = 60120592416.

The previous prime is 87691821967. The next prime is 87691822069. The reversal of 87691822015 is 51022819678.

It is a happy number.

It is a cyclic number.

It is not a de Polignac number, because 87691822015 - 2¹³ = 87691813823 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 87691822015.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 30487 + ... + 419896.

It is an arithmetic number, because the mean of its divisors is an integer number (7517809728).

Almost surely, 2^87691822015 is an apocalyptic number.

87691822015 is a deficient number, since it is larger than the sum of its proper divisors (32593133633).

87691822015 is a wasteful number, since it uses less digits than its factorization.

87691822015 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 455958.

The product of its (nonzero) digits is 483840, while the sum is 49.

The spelling of 87691822015 in words is "eighty-seven billion, six hundred ninety-one million, eight hundred twenty-two thousand, fifteen".