6461393971043 has 16 divisors (see below), whose sum is σ = 7577650275840. Its totient is φ = 5446436119200.

The previous prime is 6461393971031. The next prime is 6461393971057. The reversal of 6461393971043 is 3401793931646.

It is a cyclic number.

It is not a de Polignac number, because 6461393971043 - 2¹⁸ = 6461393708899 is a prime.

It is a super-2 number, since 2×6461393971043² (a number of 26 digits) contains 22 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 6461393971043.

It is not an unprimeable number, because it can be changed into a prime (6461393971063) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 328881248 + ... + 328900893.

It is an arithmetic number, because the mean of its divisors is an integer number (473603142240).

Almost surely, 2^{6461393971043} is an apocalyptic number.

6461393971043 is a deficient number, since it is larger than the sum of its proper divisors (1116256304797).

6461393971043 is a wasteful number, since it uses less digits than its factorization.

6461393971043 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 657782218.

The product of its (nonzero) digits is 8817984, while the sum is 56.

The spelling of 6461393971043 in words is "six trillion, four hundred sixty-one billion, three hundred ninety-three million, nine hundred seventy-one thousand, forty-three".