421607011825 has 24 divisors (see below), whose sum is σ = 524886639480. Its totient is φ = 335935756800.

The previous prime is 421607011823. The next prime is 421607011831. The reversal of 421607011825 is 528110706124.

It can be written as a sum of positive squares in 12 ways, for example, as 161596764081 + 260010247744 = 401991^2 + 509912^2 .

It is not a de Polignac number, because 421607011825 - 2¹ = 421607011823 is a prime.

It is not an unprimeable number, because it can be changed into a prime (421607011823) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 17388811 + ... + 17413039.

It is an arithmetic number, because the mean of its divisors is an integer number (21870276645).

Almost surely, 2^421607011825 is an apocalyptic number.

It is an amenable number.

421607011825 is a deficient number, since it is larger than the sum of its proper divisors (103279627655).

421607011825 is a wasteful number, since it uses less digits than its factorization.

421607011825 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 26997 (or 26992 counting only the distinct ones).

The product of its (nonzero) digits is 26880, while the sum is 37.

Adding to 421607011825 its reverse (528110706124), we get a palindrome (949717717949).

The spelling of 421607011825 in words is "four hundred twenty-one billion, six hundred seven million, eleven thousand, eight hundred twenty-five".