6561202151 has 32 divisors (see below), whose sum is σ = 8174476800. Its totient is φ = 5141335680.

The previous prime is 6561202129. The next prime is 6561202163. The reversal of 6561202151 is 1512021656.

It is a happy number.

It is a cyclic number.

It is not a de Polignac number, because 6561202151 - 2¹⁴ = 6561185767 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (6561202181) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 422360 + ... + 437618.

It is an arithmetic number, because the mean of its divisors is an integer number (255452400).

Almost surely, 2^6561202151 is an apocalyptic number.

6561202151 is a gapful number since it is divisible by the number (61) formed by its first and last digit.

6561202151 is a deficient number, since it is larger than the sum of its proper divisors (1613274649).

6561202151 is a wasteful number, since it uses less digits than its factorization.

6561202151 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 15399.

The product of its (nonzero) digits is 3600, while the sum is 29.

The square root of 6561202151 is about 81001.2478360673. The cubic root of 6561202151 is about 1872.0946673908.

The spelling of 6561202151 in words is "six billion, five hundred sixty-one million, two hundred two thousand, one hundred fifty-one".