63043551531561 has 16 divisors (see below), whose sum is σ = 86774410506240. Its totient is φ = 40671013180560.

The previous prime is 63043551531473. The next prime is 63043551531581. The reversal of 63043551531561 is 16513515534036.

It is not a de Polignac number, because 63043551531561 - 2¹⁰ = 63043551530537 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 63043551531561.

It is not an unprimeable number, because it can be changed into a prime (63043551531581) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 17021475 + ... + 20391608.

It is an arithmetic number, because the mean of its divisors is an integer number (5423400656640).

Almost surely, 2^{63043551531561} is an apocalyptic number.

It is an amenable number.

63043551531561 is a deficient number, since it is larger than the sum of its proper divisors (23730858974679).

63043551531561 is a wasteful number, since it uses less digits than its factorization.

63043551531561 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 37431236.

The product of its (nonzero) digits is 2430000, while the sum is 48.

The spelling of 63043551531561 in words is "sixty-three trillion, forty-three billion, five hundred fifty-one million, five hundred thirty-one thousand, five hundred sixty-one".