3115385781681 has 8 divisors (see below), whose sum is σ = 4154462119584. Its totient is φ = 2076616649120.

The previous prime is 3115385781659. The next prime is 3115385781733. The reversal of 3115385781681 is 1861875835113.

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

It is a cyclic number.

It is not a de Polignac number, because 3115385781681 - 2¹¹ = 3115385779633 is a prime.

It is a super-2 number, since 2×3115385781681² (a number of 26 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (3115385788681) 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, 76777671 + ... + 76818236.

It is an arithmetic number, because the mean of its divisors is an integer number (519307764948).

Almost surely, 2^{3115385781681} is an apocalyptic number.

It is an amenable number.

3115385781681 is a deficient number, since it is larger than the sum of its proper divisors (1039076337903).

3115385781681 is a wasteful number, since it uses less digits than its factorization.

3115385781681 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 153602671.

The product of its digits is 4838400, while the sum is 57.

The spelling of 3115385781681 in words is "three trillion, one hundred fifteen billion, three hundred eighty-five million, seven hundred eighty-one thousand, six hundred eighty-one".