63555503901 has 8 divisors (see below), whose sum is σ = 89725417344. Its totient is φ = 39877963200.

The previous prime is 63555503873. The next prime is 63555503923. The reversal of 63555503901 is 10930555536.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 63555503901 - 2⁷ = 63555503773 is a prime.

It is a super-2 number, since 2×63555503901² (a number of 22 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (63555503971) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 623093125 + ... + 623093226.

It is an arithmetic number, because the mean of its divisors is an integer number (11215677168).

Almost surely, 2^63555503901 is an apocalyptic number.

It is an amenable number.

63555503901 is a deficient number, since it is larger than the sum of its proper divisors (26169913443).

63555503901 is a wasteful number, since it uses less digits than its factorization.

63555503901 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1246186371.

The product of its (nonzero) digits is 303750, while the sum is 42.

The spelling of 63555503901 in words is "sixty-three billion, five hundred fifty-five million, five hundred three thousand, nine hundred one".