63639123451 has 2 divisors, whose sum is σ = 63639123452. Its totient is φ = 63639123450.

The previous prime is 63639123409. The next prime is 63639123461. The reversal of 63639123451 is 15432193636.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-63639123451 is a prime.

It is a super-2 number, since 2×63639123451² (a number of 22 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 63639123398 and 63639123407.

It is not a weakly prime, because it can be changed into another prime (63639123461) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 31819561725 + 31819561726.

It is an arithmetic number, because the mean of its divisors is an integer number (31819561726).

Almost surely, 2^63639123451 is an apocalyptic number.

63639123451 is a deficient number, since it is larger than the sum of its proper divisors (1).

63639123451 is an equidigital number, since it uses as much as digits as its factorization.

63639123451 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 349920, while the sum is 43.

The spelling of 63639123451 in words is "sixty-three billion, six hundred thirty-nine million, one hundred twenty-three thousand, four hundred fifty-one".