516180394 has 4 divisors (see below), whose sum is σ = 774270594. Its totient is φ = 258090196.

The previous prime is 516180383. The next prime is 516180407. The reversal of 516180394 is 493081615.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in only one way, i.e., 504586369 + 11594025 = 22463^2 + 3405^2 .

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 129045097 + ... + 129045100.

Almost surely, 2^516180394 is an apocalyptic number.

516180394 is a deficient number, since it is larger than the sum of its proper divisors (258090200).

516180394 is a wasteful number, since it uses less digits than its factorization.

516180394 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 258090199.

The product of its (nonzero) digits is 25920, while the sum is 37.

The square root of 516180394 is about 22719.6037377416. The cubic root of 516180394 is about 802.1713895437.

The spelling of 516180394 in words is "five hundred sixteen million, one hundred eighty thousand, three hundred ninety-four".