63126489661 has 4 divisors (see below), whose sum is σ = 63136552732. Its totient is φ = 63116426592.

The previous prime is 63126489653. The next prime is 63126489697. The reversal of 63126489661 is 16698462136.

It is a happy number.

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 29384473561 + 33742016100 = 171419^2 + 183690^2 .

It is a cyclic number.

It is not a de Polignac number, because 63126489661 - 2³ = 63126489653 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 63126489599 and 63126489608.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (63126439661) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 5022120 + ... + 5034673.

It is an arithmetic number, because the mean of its divisors is an integer number (15784138183).

Almost surely, 2^63126489661 is an apocalyptic number.

It is an amenable number.

63126489661 is a deficient number, since it is larger than the sum of its proper divisors (10063071).

63126489661 is a wasteful number, since it uses less digits than its factorization.

63126489661 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10063070.

The product of its digits is 2239488, while the sum is 52.

The spelling of 63126489661 in words is "sixty-three billion, one hundred twenty-six million, four hundred eighty-nine thousand, six hundred sixty-one".