2015386386981 has 8 divisors (see below), whose sum is σ = 2931471108384. Its totient is φ = 1221446295120.

The previous prime is 2015386386977. The next prime is 2015386386983. The reversal of 2015386386981 is 1896836835102.

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

It is not a de Polignac number, because 2015386386981 - 2² = 2015386386977 is a prime.

It is a super-2 number, since 2×2015386386981² (a number of 25 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2015386386983) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 30536157346 + ... + 30536157411.

It is an arithmetic number, because the mean of its divisors is an integer number (366433888548).

Almost surely, 2^{2015386386981} is an apocalyptic number.

It is an amenable number.

2015386386981 is a deficient number, since it is larger than the sum of its proper divisors (916084721403).

2015386386981 is a wasteful number, since it uses less digits than its factorization.

2015386386981 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 61072314771.

The product of its (nonzero) digits is 14929920, while the sum is 60.

The spelling of 2015386386981 in words is "two trillion, fifteen billion, three hundred eighty-six million, three hundred eighty-six thousand, nine hundred eighty-one".