126281550361 has 4 divisors (see below), whose sum is σ = 126282956724. Its totient is φ = 126280144000.

The previous prime is 126281550349. The next prime is 126281550377. The reversal of 126281550361 is 163055182621.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 61867110361 + 64414440000 = 248731^2 + 253800^2 .

It is a cyclic number.

It is not a de Polignac number, because 126281550361 - 2⁷ = 126281550233 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (126281550331) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 558580 + ... + 751381.

It is an arithmetic number, because the mean of its divisors is an integer number (31570739181).

Almost surely, 2^126281550361 is an apocalyptic number.

It is an amenable number.

126281550361 is a deficient number, since it is larger than the sum of its proper divisors (1406363).

126281550361 is an equidigital number, since it uses as much as digits as its factorization.

126281550361 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1406362.

The product of its (nonzero) digits is 86400, while the sum is 40.

The spelling of 126281550361 in words is "one hundred twenty-six billion, two hundred eighty-one million, five hundred fifty thousand, three hundred sixty-one".