63121965907 has 32 divisors (see below), whose sum is σ = 84940531200. Its totient is φ = 45300971520.

The previous prime is 63121965847. The next prime is 63121965931. The reversal of 63121965907 is 70956912136.

It is not a de Polignac number, because 63121965907 - 2⁷ = 63121965779 is a prime.

It is not an unprimeable number, because it can be changed into a prime (63121965937) 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 31 ways as a sum of consecutive naturals, for example, 379228 + ... + 519670.

It is an arithmetic number, because the mean of its divisors is an integer number (2654391600).

Almost surely, 2^63121965907 is an apocalyptic number.

63121965907 is a deficient number, since it is larger than the sum of its proper divisors (21818565293).

63121965907 is a wasteful number, since it uses less digits than its factorization.

63121965907 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 140923.

The product of its (nonzero) digits is 612360, while the sum is 49.

The spelling of 63121965907 in words is "sixty-three billion, one hundred twenty-one million, nine hundred sixty-five thousand, nine hundred seven".