2043937557561 has 8 divisors (see below), whose sum is σ = 2885558904864. Its totient is φ = 1282470624320.

The previous prime is 2043937557559. The next prime is 2043937557601. The reversal of 2043937557561 is 1657557393402.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 2043937557561 - 2¹ = 2043937557559 is a prime.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (2043937553561) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 20038603455 + ... + 20038603556.

It is an arithmetic number, because the mean of its divisors is an integer number (360694863108).

Almost surely, 2^{2043937557561} is an apocalyptic number.

It is an amenable number.

2043937557561 is a deficient number, since it is larger than the sum of its proper divisors (841621347303).

2043937557561 is a wasteful number, since it uses less digits than its factorization.

2043937557561 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 40077207031.

The product of its (nonzero) digits is 23814000, while the sum is 57.

The spelling of 2043937557561 in words is "two trillion, forty-three billion, nine hundred thirty-seven million, five hundred fifty-seven thousand, five hundred sixty-one".