63345705251 has 4 divisors (see below), whose sum is σ = 64213454712. Its totient is φ = 62477955792.

The previous prime is 63345705223. The next prime is 63345705271. The reversal of 63345705251 is 15250754336.

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 63345705251 - 2⁶ = 63345705187 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 63345705199 and 63345705208.

It is not an unprimeable number, because it can be changed into a prime (63345705211) 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, 433874621 + ... + 433874766.

It is an arithmetic number, because the mean of its divisors is an integer number (16053363678).

Almost surely, 2^63345705251 is an apocalyptic number.

63345705251 is a deficient number, since it is larger than the sum of its proper divisors (867749461).

63345705251 is an equidigital number, since it uses as much as digits as its factorization.

63345705251 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 867749460.

The product of its (nonzero) digits is 378000, while the sum is 41.

The spelling of 63345705251 in words is "sixty-three billion, three hundred forty-five million, seven hundred five thousand, two hundred fifty-one".