2543432023661 has 16 divisors (see below), whose sum is σ = 2604402142848. Its totient is φ = 2483417664000.

The previous prime is 2543432023619. The next prime is 2543432023663. The reversal of 2543432023661 is 1663202343452.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-2543432023661 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2543432023663) 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, 1400936 + ... + 2655086.

It is an arithmetic number, because the mean of its divisors is an integer number (162775133928).

Almost surely, 2^{2543432023661} is an apocalyptic number.

It is an amenable number.

2543432023661 is a deficient number, since it is larger than the sum of its proper divisors (60970119187).

2543432023661 is a wasteful number, since it uses less digits than its factorization.

2543432023661 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1254532.

The product of its (nonzero) digits is 622080, while the sum is 41.

The spelling of 2543432023661 in words is "two trillion, five hundred forty-three billion, four hundred thirty-two million, twenty-three thousand, six hundred sixty-one".