42170115505961 has 2 divisors, whose sum is σ = 42170115505962. Its totient is φ = 42170115505960.

The previous prime is 42170115505883. The next prime is 42170115505967. The reversal of 42170115505961 is 16950551107124.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 26664634215961 + 15505481290000 = 5163781^2 + 3937700^2 .

It is a cyclic number.

It is not a de Polignac number, because 42170115505961 - 2²⁶ = 42170048397097 is a prime.

It is not a weakly prime, because it can be changed into another prime (42170115505967) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 21085057752980 + 21085057752981.

It is an arithmetic number, because the mean of its divisors is an integer number (21085057752981).

Almost surely, 2^{42170115505961} is an apocalyptic number.

It is an amenable number.

42170115505961 is a deficient number, since it is larger than the sum of its proper divisors (1).

42170115505961 is an equidigital number, since it uses as much as digits as its factorization.

42170115505961 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 378000, while the sum is 47.

The spelling of 42170115505961 in words is "forty-two trillion, one hundred seventy billion, one hundred fifteen million, five hundred five thousand, nine hundred sixty-one".