42564213751 has 4 divisors (see below), whose sum is σ = 42573177504. Its totient is φ = 42555250000.

The previous prime is 42564213749. The next prime is 42564213773. The reversal of 42564213751 is 15731246524.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 42564213751 - 2¹ = 42564213749 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 (42564213151) 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, 4474750 + ... + 4484251.

It is an arithmetic number, because the mean of its divisors is an integer number (10643294376).

Almost surely, 2^42564213751 is an apocalyptic number.

42564213751 is a deficient number, since it is larger than the sum of its proper divisors (8963753).

42564213751 is an equidigital number, since it uses as much as digits as its factorization.

42564213751 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8963752.

The product of its digits is 201600, while the sum is 40.

The spelling of 42564213751 in words is "forty-two billion, five hundred sixty-four million, two hundred thirteen thousand, seven hundred fifty-one".