63551587881 has 8 divisors (see below), whose sum is σ = 85896210400. Its totient is φ = 41787345312.

The previous prime is 63551587837. The next prime is 63551587901. The reversal of 63551587881 is 18878515536.

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

It is not a de Polignac number, because 63551587881 - 2¹⁴ = 63551571497 is a prime.

It is a super-2 number, since 2×63551587881² (a number of 22 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (63551580881) 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 7 ways as a sum of consecutive naturals, for example, 145094731 + ... + 145095168.

It is an arithmetic number, because the mean of its divisors is an integer number (10737026300).

Almost surely, 2^63551587881 is an apocalyptic number.

It is an amenable number.

63551587881 is a deficient number, since it is larger than the sum of its proper divisors (22344622519).

63551587881 is a wasteful number, since it uses less digits than its factorization.

63551587881 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 290189975.

The product of its digits is 8064000, while the sum is 57.

The spelling of 63551587881 in words is "sixty-three billion, five hundred fifty-one million, five hundred eighty-seven thousand, eight hundred eighty-one".