56435042056661 has 4 divisors (see below), whose sum is σ = 57747484895232. Its totient is φ = 55122599218092.

The previous prime is 56435042056651. The next prime is 56435042056693. The reversal of 56435042056661 is 16665024053465.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 56435042056661 - 2¹⁸ = 56435041794517 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 (56435042056651) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 656221419221 + ... + 656221419306.

It is an arithmetic number, because the mean of its divisors is an integer number (14436871223808).

Almost surely, 2^{56435042056661} is an apocalyptic number.

It is an amenable number.

56435042056661 is a deficient number, since it is larger than the sum of its proper divisors (1312442838571).

56435042056661 is a wasteful number, since it uses less digits than its factorization.

56435042056661 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1312442838570.

The product of its (nonzero) digits is 15552000, while the sum is 53.

The spelling of 56435042056661 in words is "fifty-six trillion, four hundred thirty-five billion, forty-two million, fifty-six thousand, six hundred sixty-one".