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142638218643 = 347546072881
BaseRepresentation
bin1000010011010111100…
…1100111110110010011
3111122011200222021100210
42010311321213312103
54314110340444033
6145305504015203
713206464565564
oct2046571476623
9448150867323
10142638218643
1155546612928
1223789301503
13105b2326a0b
146c91b7c16b
153a9c650d63
hex2135e67d93

142638218643 has 4 divisors (see below), whose sum is σ = 190184291528. Its totient is φ = 95092145760.

The previous prime is 142638218641. The next prime is 142638218647. The reversal of 142638218643 is 346812836241.

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

It is not a de Polignac number, because 142638218643 - 21 = 142638218641 is a prime.

It is a super-2 number, since 2×1426382186432 (a number of 23 digits) contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 142638218592 and 142638218601.

It is not an unprimeable number, because it can be changed into a prime (142638218641) 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, 23773036438 + ... + 23773036443.

It is an arithmetic number, because the mean of its divisors is an integer number (47546072882).

Almost surely, 2142638218643 is an apocalyptic number.

142638218643 is a deficient number, since it is larger than the sum of its proper divisors (47546072885).

142638218643 is an equidigital number, since it uses as much as digits as its factorization.

142638218643 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 47546072884.

The product of its digits is 1327104, while the sum is 48.

The spelling of 142638218643 in words is "one hundred forty-two billion, six hundred thirty-eight million, two hundred eighteen thousand, six hundred forty-three".

Divisors: 1 3 47546072881 142638218643