6461156543 has 2 divisors, whose sum is σ = 6461156544. Its totient is φ = 6461156542.

The previous prime is 6461156531. The next prime is 6461156579. The reversal of 6461156543 is 3456511646.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 6461156543 - 2¹⁸ = 6460894399 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 6461156543.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (6461156593) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3230578271 + 3230578272.

It is an arithmetic number, because the mean of its divisors is an integer number (3230578272).

Almost surely, 2^6461156543 is an apocalyptic number.

6461156543 is a deficient number, since it is larger than the sum of its proper divisors (1).

6461156543 is an equidigital number, since it uses as much as digits as its factorization.

6461156543 is an evil number, because the sum of its binary digits is even.

The product of its digits is 259200, while the sum is 41.

The square root of 6461156543 is about 80381.3196146965. The cubic root of 6461156543 is about 1862.5306193666.

The spelling of 6461156543 in words is "six billion, four hundred sixty-one million, one hundred fifty-six thousand, five hundred forty-three".