512016442155261 has 24 divisors (see below), whose sum is σ = 740362090418496. Its totient is φ = 340983015871680.

The previous prime is 512016442155223. The next prime is 512016442155347. The reversal of 512016442155261 is 162551244610215.

512016442155261 is a `hidden beast` number, since 5 + 1 + 2 + 0 + 16 + 4 + 4 + 21 + 552 + 61 = 666.

It is not a de Polignac number, because 512016442155261 - 2³¹ = 512014294671613 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (512016442155461) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 1314410626 + ... + 1314800108.

It is an arithmetic number, because the mean of its divisors is an integer number (30848420434104).

Almost surely, 2^{512016442155261} is an apocalyptic number.

It is an amenable number.

512016442155261 is a deficient number, since it is larger than the sum of its proper divisors (228345648263235).

512016442155261 is a wasteful number, since it uses less digits than its factorization.

512016442155261 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 543713 (or 543710 counting only the distinct ones).

The product of its (nonzero) digits is 576000, while the sum is 45.

Adding to 512016442155261 its reverse (162551244610215), we get a palindrome (674567686765476).

The spelling of 512016442155261 in words is "five hundred twelve trillion, sixteen billion, four hundred forty-two million, one hundred fifty-five thousand, two hundred sixty-one".