63120045260561 has 4 divisors (see below), whose sum is σ = 63120465955824. Its totient is φ = 63119624565300.

The previous prime is 63120045260521. The next prime is 63120045260579. The reversal of 63120045260561 is 16506254002136.

It is a happy number.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 63120045260561 - 2²⁶ = 63119978151697 is a prime.

It is a super-2 number, since 2×63120045260561² (a number of 28 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (63120045260521) 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, 210122495 + ... + 210422676.

It is an arithmetic number, because the mean of its divisors is an integer number (15780116488956).

Almost surely, 2^{63120045260561} is an apocalyptic number.

It is an amenable number.

63120045260561 is a deficient number, since it is larger than the sum of its proper divisors (420695263).

63120045260561 is a wasteful number, since it uses less digits than its factorization.

63120045260561 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 420695262.

The product of its (nonzero) digits is 259200, while the sum is 41.

Adding to 63120045260561 its reverse (16506254002136), we get a palindrome (79626299262697).

The spelling of 63120045260561 in words is "sixty-three trillion, one hundred twenty billion, forty-five million, two hundred sixty thousand, five hundred sixty-one".