63421624525511 has 4 divisors (see below), whose sum is σ = 72481856600592. Its totient is φ = 54361392450432.

The previous prime is 63421624525507. The next prime is 63421624525517. The reversal of 63421624525511 is 11552542612436.

It is a happy number.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 63421624525511 - 2² = 63421624525507 is a prime.

It is a super-2 number, since 2×63421624525511² (a number of 28 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (63421624525517) 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, 4530116037530 + ... + 4530116037543.

It is an arithmetic number, because the mean of its divisors is an integer number (18120464150148).

Almost surely, 2^{63421624525511} is an apocalyptic number.

63421624525511 is a deficient number, since it is larger than the sum of its proper divisors (9060232075081).

63421624525511 is an equidigital number, since it uses as much as digits as its factorization.

63421624525511 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9060232075080.

The product of its digits is 1728000, while the sum is 47.

The spelling of 63421624525511 in words is "sixty-three trillion, four hundred twenty-one billion, six hundred twenty-four million, five hundred twenty-five thousand, five hundred eleven".