142551664261 has 2 divisors, whose sum is σ = 142551664262. Its totient is φ = 142551664260.

The previous prime is 142551664243. The next prime is 142551664303. The reversal of 142551664261 is 162466155241.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 141455723236 + 1095941025 = 376106^2 + 33105^2 .

It is a cyclic number.

It is not a de Polignac number, because 142551664261 - 2⁷ = 142551664133 is a prime.

It is a super-2 number, since 2×142551664261² (a number of 23 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (142551664201) 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 as a sum of consecutive naturals, namely, 71275832130 + 71275832131.

It is an arithmetic number, because the mean of its divisors is an integer number (71275832131).

Almost surely, 2^142551664261 is an apocalyptic number.

It is an amenable number.

142551664261 is a deficient number, since it is larger than the sum of its proper divisors (1).

142551664261 is an equidigital number, since it uses as much as digits as its factorization.

142551664261 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 345600, while the sum is 43.

The spelling of 142551664261 in words is "one hundred forty-two billion, five hundred fifty-one million, six hundred sixty-four thousand, two hundred sixty-one".