2661464000643 has 32 divisors (see below), whose sum is σ = 4066519790592. Its totient is φ = 1516733644800.

The previous prime is 2661464000617. The next prime is 2661464000669. The reversal of 2661464000643 is 3460004641662.

It is an interprime number because it is at equal distance from previous prime (2661464000617) and next prime (2661464000669).

It is not a de Polignac number, because 2661464000643 - 2¹² = 2661463996547 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 2661464000595 and 2661464000604.

It is not an unprimeable number, because it can be changed into a prime (2661464000543) 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, 11746930 + ... + 11971352.

It is an arithmetic number, because the mean of its divisors is an integer number (127078743456).

Almost surely, 2^{2661464000643} is an apocalyptic number.

2661464000643 is a deficient number, since it is larger than the sum of its proper divisors (1405055789949).

2661464000643 is a wasteful number, since it uses less digits than its factorization.

2661464000643 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 225955.

The product of its (nonzero) digits is 497664, while the sum is 42.

The spelling of 2661464000643 in words is "two trillion, six hundred sixty-one billion, four hundred sixty-four million, six hundred forty-three", and thus it is an aban number.