42780650461 has 2 divisors, whose sum is σ = 42780650462. Its totient is φ = 42780650460.

The previous prime is 42780650359. The next prime is 42780650503. The reversal of 42780650461 is 16405608724.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 40694992900 + 2085657561 = 201730^2 + 45669^2 .

It is a cyclic number.

It is not a de Polignac number, because 42780650461 - 2⁹ = 42780649949 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (42780650261) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 21390325230 + 21390325231.

It is an arithmetic number, because the mean of its divisors is an integer number (21390325231).

Almost surely, 2^42780650461 is an apocalyptic number.

It is an amenable number.

42780650461 is a deficient number, since it is larger than the sum of its proper divisors (1).

42780650461 is an equidigital number, since it uses as much as digits as its factorization.

42780650461 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 322560, while the sum is 43.

The spelling of 42780650461 in words is "forty-two billion, seven hundred eighty million, six hundred fifty thousand, four hundred sixty-one".