2868633521781 has 4 divisors (see below), whose sum is σ = 3824844695712. Its totient is φ = 1912422347852.

The previous prime is 2868633521737. The next prime is 2868633521857. The reversal of 2868633521781 is 1871253368682.

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 2868633521781 - 2⁹ = 2868633521269 is a prime.

It is a super-2 number, since 2×2868633521781² (a number of 26 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2868633521681) 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, 478105586961 + ... + 478105586966.

It is an arithmetic number, because the mean of its divisors is an integer number (956211173928).

Almost surely, 2^{2868633521781} is an apocalyptic number.

It is an amenable number.

2868633521781 is a deficient number, since it is larger than the sum of its proper divisors (956211173931).

2868633521781 is an equidigital number, since it uses as much as digits as its factorization.

2868633521781 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 956211173930.

The product of its digits is 23224320, while the sum is 60.

The spelling of 2868633521781 in words is "two trillion, eight hundred sixty-eight billion, six hundred thirty-three million, five hundred twenty-one thousand, seven hundred eighty-one".