5151661516 has 12 divisors (see below), whose sum is σ = 9015952288. Its totient is φ = 2575675152.

The previous prime is 5151661481. The next prime is 5151661519. The reversal of 5151661516 is 6151661515.

It is not an unprimeable number, because it can be changed into a prime (5151661519) 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, 68590 + ... + 122506.

Almost surely, 2^5151661516 is an apocalyptic number.

It is an amenable number.

5151661516 is a deficient number, since it is larger than the sum of its proper divisors (3864290772).

5151661516 is a wasteful number, since it uses less digits than its factorization.

5151661516 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 77808 (or 77806 counting only the distinct ones).

The product of its digits is 27000, while the sum is 37.

The square root of 5151661516 is about 71775.0758689951. The cubic root of 5151661516 is about 1727.0931969702.

Subtracting 5151661516 from its reverse (6151661515), we obtain a palindrome (999999999).

The spelling of 5151661516 in words is "five billion, one hundred fifty-one million, six hundred sixty-one thousand, five hundred sixteen".