42087500449 has 2 divisors, whose sum is σ = 42087500450. Its totient is φ = 42087500448.

The previous prime is 42087500431. The next prime is 42087500471. The reversal of 42087500449 is 94400578024.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 30451995025 + 11635505424 = 174505^2 + 107868^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-42087500449 is a prime.

It is not a weakly prime, because it can be changed into another prime (42087500149) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 21043750224 + 21043750225.

It is an arithmetic number, because the mean of its divisors is an integer number (21043750225).

Almost surely, 2^42087500449 is an apocalyptic number.

It is an amenable number.

42087500449 is a deficient number, since it is larger than the sum of its proper divisors (1).

42087500449 is an equidigital number, since it uses as much as digits as its factorization.

42087500449 is an evil number, because the sum of its binary digits is even.

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

The spelling of 42087500449 in words is "forty-two billion, eighty-seven million, five hundred thousand, four hundred forty-nine".