172042448377 has 2 divisors, whose sum is σ = 172042448378. Its totient is φ = 172042448376.

The previous prime is 172042448363. The next prime is 172042448453. The reversal of 172042448377 is 773844240271.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 148456860601 + 23585587776 = 385301^2 + 153576^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-172042448377 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 172042448377.

It is not a weakly prime, because it can be changed into another prime (172042418377) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 86021224188 + 86021224189.

It is an arithmetic number, because the mean of its divisors is an integer number (86021224189).

Almost surely, 2^172042448377 is an apocalyptic number.

It is an amenable number.

172042448377 is a deficient number, since it is larger than the sum of its proper divisors (1).

172042448377 is an equidigital number, since it uses as much as digits as its factorization.

172042448377 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 2107392, while the sum is 49.

The spelling of 172042448377 in words is "one hundred seventy-two billion, forty-two million, four hundred forty-eight thousand, three hundred seventy-seven".