143642621620261 has 2 divisors, whose sum is σ = 143642621620262. Its totient is φ = 143642621620260.

The previous prime is 143642621620153. The next prime is 143642621620321. The reversal of 143642621620261 is 162026126246341.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 99505612562500 + 44137009057761 = 9975250^2 + 6643569^2 .

It is a cyclic number.

It is not a de Polignac number, because 143642621620261 - 2⁴¹ = 141443598364709 is a prime.

It is a super-3 number, since 3×143642621620261³ (a number of 43 digits) contains 333 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (143642621620061) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 71821310810130 + 71821310810131.

It is an arithmetic number, because the mean of its divisors is an integer number (71821310810131).

Almost surely, 2^{143642621620261} is an apocalyptic number.

It is an amenable number.

143642621620261 is a deficient number, since it is larger than the sum of its proper divisors (1).

143642621620261 is an equidigital number, since it uses as much as digits as its factorization.

143642621620261 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 995328, while the sum is 46.

The spelling of 143642621620261 in words is "one hundred forty-three trillion, six hundred forty-two billion, six hundred twenty-one million, six hundred twenty thousand, two hundred sixty-one".