642362411661 has 16 divisors (see below), whose sum is σ = 893973073920. Its totient is φ = 409507156080.

The previous prime is 642362411641. The next prime is 642362411671. The reversal of 642362411661 is 166114263246.

It is not a de Polignac number, because 642362411661 - 2⁵ = 642362411629 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (642362411641) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1062325 + ... + 1553466.

It is an arithmetic number, because the mean of its divisors is an integer number (55873317120).

Almost surely, 2^642362411661 is an apocalyptic number.

It is an amenable number.

642362411661 is a deficient number, since it is larger than the sum of its proper divisors (251610662259).

642362411661 is a wasteful number, since it uses less digits than its factorization.

642362411661 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2619376.

The product of its digits is 248832, while the sum is 42.

The spelling of 642362411661 in words is "six hundred forty-two billion, three hundred sixty-two million, four hundred eleven thousand, six hundred sixty-one".