516378261 has 8 divisors (see below), whose sum is σ = 786862144. Its totient is φ = 295073280.

The previous prime is 516378251. The next prime is 516378299. The reversal of 516378261 is 162873615.

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

It is not a de Polignac number, because 516378261 - 2⁶ = 516378197 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 (516378251) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 12294700 + ... + 12294741.

It is an arithmetic number, because the mean of its divisors is an integer number (98357768).

Almost surely, 2^516378261 is an apocalyptic number.

It is an amenable number.

516378261 is a deficient number, since it is larger than the sum of its proper divisors (270483883).

516378261 is a wasteful number, since it uses less digits than its factorization.

516378261 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 24589451.

The product of its digits is 60480, while the sum is 39.

The square root of 516378261 is about 22723.9578638933. The cubic root of 516378261 is about 802.2738750129.

The spelling of 516378261 in words is "five hundred sixteen million, three hundred seventy-eight thousand, two hundred sixty-one".