42406464661 has 4 divisors (see below), whose sum is σ = 46261597824. Its totient is φ = 38551331500.

The previous prime is 42406464649. The next prime is 42406464677. The reversal of 42406464661 is 16646460424.

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 not a de Polignac number, because 42406464661 - 2¹¹ = 42406462613 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 (42406464461) 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, 1927566565 + ... + 1927566586.

It is an arithmetic number, because the mean of its divisors is an integer number (11565399456).

Almost surely, 2^42406464661 is an apocalyptic number.

It is an amenable number.

42406464661 is a deficient number, since it is larger than the sum of its proper divisors (3855133163).

42406464661 is a wasteful number, since it uses less digits than its factorization.

42406464661 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3855133162.

The product of its (nonzero) digits is 663552, while the sum is 43.

The spelling of 42406464661 in words is "forty-two billion, four hundred six million, four hundred sixty-four thousand, six hundred sixty-one".