516912109157 has 8 divisors (see below), whose sum is σ = 517853031000. Its totient is φ = 515971344384.

The previous prime is 516912109141. The next prime is 516912109159. The reversal of 516912109157 is 751901219615.

It is a Cunningham number, because it is equal to 718966²+1.

It can be written as a sum of positive squares in 4 ways, for example, as 370620393796 + 146291715361 = 608786^2 + 382481^2 .

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 516912109157 - 2⁴ = 516912109141 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 (516912109159) 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, 8051219 + ... + 8115167.

It is an arithmetic number, because the mean of its divisors is an integer number (64731628875).

Almost surely, 2^516912109157 is an apocalyptic number.

It is an amenable number.

516912109157 is a deficient number, since it is larger than the sum of its proper divisors (940921843).

516912109157 is a wasteful number, since it uses less digits than its factorization.

516912109157 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 78535.

The product of its (nonzero) digits is 170100, while the sum is 47.

The spelling of 516912109157 in words is "five hundred sixteen billion, nine hundred twelve million, one hundred nine thousand, one hundred fifty-seven".