7142987561173 has 2 divisors, whose sum is σ = 7142987561174. Its totient is φ = 7142987561172.

The previous prime is 7142987561159. The next prime is 7142987561189. The reversal of 7142987561173 is 3711657892417.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 6167906359729 + 975081201444 = 2483527^2 + 987462^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-7142987561173 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (7142987061173) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3571493780586 + 3571493780587.

It is an arithmetic number, because the mean of its divisors is an integer number (3571493780587).

Almost surely, 2^{7142987561173} is an apocalyptic number.

It is an amenable number.

7142987561173 is a deficient number, since it is larger than the sum of its proper divisors (1).

7142987561173 is an equidigital number, since it uses as much as digits as its factorization.

7142987561173 is an evil number, because the sum of its binary digits is even.

The product of its digits is 17781120, while the sum is 61.

The spelling of 7142987561173 in words is "seven trillion, one hundred forty-two billion, nine hundred eighty-seven million, five hundred sixty-one thousand, one hundred seventy-three".