142574477681 has 2 divisors, whose sum is σ = 142574477682. Its totient is φ = 142574477680.

The previous prime is 142574477651. The next prime is 142574477687. The reversal of 142574477681 is 186774475241.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 142219494400 + 354983281 = 377120^2 + 18841^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-142574477681 is a prime.

It is a super-2 number, since 2×142574477681² (a number of 23 digits) contains 22 as substring.

It is a Sophie Germain prime.

It is a Curzon number.

It is not a weakly prime, because it can be changed into another prime (142574477687) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 71287238840 + 71287238841.

It is an arithmetic number, because the mean of its divisors is an integer number (71287238841).

Almost surely, 2^142574477681 is an apocalyptic number.

It is an amenable number.

142574477681 is a deficient number, since it is larger than the sum of its proper divisors (1).

142574477681 is an equidigital number, since it uses as much as digits as its factorization.

142574477681 is an evil number, because the sum of its binary digits is even.

The product of its digits is 10536960, while the sum is 56.

The spelling of 142574477681 in words is "one hundred forty-two billion, five hundred seventy-four million, four hundred seventy-seven thousand, six hundred eighty-one".