642215610741 has 16 divisors (see below), whose sum is σ = 869107533248. Its totient is φ = 421734297600.

The previous prime is 642215610737. The next prime is 642215610749. The reversal of 642215610741 is 147016512246.

It is not a de Polignac number, because 642215610741 - 2² = 642215610737 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 642215610741.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (642215610749) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 5343651 + ... + 5462511.

It is an arithmetic number, because the mean of its divisors is an integer number (54319220828).

Almost surely, 2^642215610741 is an apocalyptic number.

It is an amenable number.

642215610741 is a deficient number, since it is larger than the sum of its proper divisors (226891922507).

642215610741 is a wasteful number, since it uses less digits than its factorization.

642215610741 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 145812.

The product of its (nonzero) digits is 80640, while the sum is 39.

The spelling of 642215610741 in words is "six hundred forty-two billion, two hundred fifteen million, six hundred ten thousand, seven hundred forty-one".