512801861 has 16 divisors (see below), whose sum is σ = 604558080. Its totient is φ = 428819520.

The previous prime is 512801843. The next prime is 512801893. The reversal of 512801861 is 168108215.

It is a cyclic number.

It is not a de Polignac number, because 512801861 - 2¹⁸ = 512539717 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (512881861) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 35780 + ... + 48018.

It is an arithmetic number, because the mean of its divisors is an integer number (37784880).

Almost surely, 2^512801861 is an apocalyptic number.

It is an amenable number.

512801861 is a deficient number, since it is larger than the sum of its proper divisors (91756219).

512801861 is a wasteful number, since it uses less digits than its factorization.

512801861 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12556.

The product of its (nonzero) digits is 3840, while the sum is 32.

The square root of 512801861 is about 22645.1288581010. The cubic root of 512801861 is about 800.4174181023.

The spelling of 512801861 in words is "five hundred twelve million, eight hundred one thousand, eight hundred sixty-one".