6516436401 has 12 divisors (see below), whose sum is σ = 9612899712. Its totient is φ = 4251858936.

The previous prime is 6516436363. The next prime is 6516436439. The reversal of 6516436401 is 1046346156.

It is a happy number.

6516436401 is a `hidden beast` number, since 6 + 5 + 1 + 6 + 4 + 3 + 640 + 1 = 666.

It is an interprime number because it is at equal distance from previous prime (6516436363) and next prime (6516436439).

It is not a de Polignac number, because 6516436401 - 2⁷ = 6516436273 is a prime.

It is not an unprimeable number, because it can be changed into a prime (6516436471) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 7702221 + ... + 7703066.

It is an arithmetic number, because the mean of its divisors is an integer number (801074976).

Almost surely, 2^6516436401 is an apocalyptic number.

It is an amenable number.

6516436401 is a deficient number, since it is larger than the sum of its proper divisors (3096463311).

6516436401 is a wasteful number, since it uses less digits than its factorization.

6516436401 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 15405340 (or 15405337 counting only the distinct ones).

The product of its (nonzero) digits is 51840, while the sum is 36.

The square root of 6516436401 is about 80724.4473564236. The cubic root of 6516436401 is about 1867.8273069211.

The spelling of 6516436401 in words is "six billion, five hundred sixteen million, four hundred thirty-six thousand, four hundred one".