2155168101815 has 8 divisors (see below), whose sum is σ = 2587974316080. Its totient is φ = 1722952752192.

The previous prime is 2155168101803. The next prime is 2155168101839. The reversal of 2155168101815 is 5181018615512.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-2155168101815 is a prime.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 147708134 + ... + 147722723.

It is an arithmetic number, because the mean of its divisors is an integer number (323496789510).

Almost surely, 2^{2155168101815} is an apocalyptic number.

2155168101815 is a deficient number, since it is larger than the sum of its proper divisors (432806214265).

2155168101815 is a wasteful number, since it uses less digits than its factorization.

2155168101815 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 295432321.

The product of its (nonzero) digits is 96000, while the sum is 44.

The spelling of 2155168101815 in words is "two trillion, one hundred fifty-five billion, one hundred sixty-eight million, one hundred one thousand, eight hundred fifteen".