5156619866 has 8 divisors (see below), whose sum is σ = 7735696020. Its totient is φ = 2578054528.

The previous prime is 5156619847. The next prime is 5156619869. The reversal of 5156619866 is 6689166515.

It can be written as a sum of positive squares in 2 ways, for example, as 3968370025 + 1188249841 = 62995^2 + 34471^2 .

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

It is not an unprimeable number, because it can be changed into a prime (5156619869) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 101381 + ... + 143496.

Almost surely, 2^5156619866 is an apocalyptic number.

5156619866 is a deficient number, since it is larger than the sum of its proper divisors (2579076154).

5156619866 is a wasteful number, since it uses less digits than its factorization.

5156619866 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 255408.

The product of its digits is 2332800, while the sum is 53.

The square root of 5156619866 is about 71809.6084517942. The cubic root of 5156619866 is about 1727.6471144844.

The spelling of 5156619866 in words is "five billion, one hundred fifty-six million, six hundred nineteen thousand, eight hundred sixty-six".