63806785451 has 4 divisors (see below), whose sum is σ = 64438535904. Its totient is φ = 63175035000.

The previous prime is 63806785411. The next prime is 63806785573. The reversal of 63806785451 is 15458760836.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-63806785451 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 63806785393 and 63806785402.

It is not an unprimeable number, because it can be changed into a prime (63806785411) 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, 315875075 + ... + 315875276.

It is an arithmetic number, because the mean of its divisors is an integer number (16109633976).

Almost surely, 2^63806785451 is an apocalyptic number.

63806785451 is a deficient number, since it is larger than the sum of its proper divisors (631750453).

63806785451 is a wasteful number, since it uses less digits than its factorization.

63806785451 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 631750452.

The product of its (nonzero) digits is 4838400, while the sum is 53.

The spelling of 63806785451 in words is "sixty-three billion, eight hundred six million, seven hundred eighty-five thousand, four hundred fifty-one".