6516038377 has 4 divisors (see below), whose sum is σ = 6516235476. Its totient is φ = 6515841280.

The previous prime is 6516038363. The next prime is 6516038383. The reversal of 6516038377 is 7738306156.

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

It can be written as a sum of positive squares in 2 ways, for example, as 683508736 + 5832529641 = 26144^2 + 76371^2 .

It is a cyclic number.

It is not a de Polignac number, because 6516038377 - 2¹⁵ = 6516005609 is a prime.

It is a super-2 number, since 2×6516038377² = 84917512261073588258, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (6516038317) 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, 35524 + ... + 119557.

It is an arithmetic number, because the mean of its divisors is an integer number (1629058869).

Almost surely, 2^6516038377 is an apocalyptic number.

It is an amenable number.

6516038377 is a deficient number, since it is larger than the sum of its proper divisors (197099).

6516038377 is a wasteful number, since it uses less digits than its factorization.

6516038377 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 197098.

The product of its (nonzero) digits is 635040, while the sum is 46.

The square root of 6516038377 is about 80721.9819937543. The cubic root of 6516038377 is about 1867.7892771767.

The spelling of 6516038377 in words is "six billion, five hundred sixteen million, thirty-eight thousand, three hundred seventy-seven".