663531422125 has 128 divisors (see below), whose sum is σ = 1040750290944. Its totient is φ = 414904320000.

The previous prime is 663531422107. The next prime is 663531422137. The reversal of 663531422125 is 521224135366.

663531422125 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 663531422125 - 2¹³ = 663531413933 is a prime.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 127 ways as a sum of consecutive naturals, for example, 29464620 + ... + 29487130.

It is an arithmetic number, because the mean of its divisors is an integer number (8130861648).

Almost surely, 2^663531422125 is an apocalyptic number.

663531422125 is a gapful number since it is divisible by the number (65) formed by its first and last digit.

It is an amenable number.

663531422125 is a deficient number, since it is larger than the sum of its proper divisors (377218868819).

663531422125 is a wasteful number, since it uses less digits than its factorization.

663531422125 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 22664 (or 22654 counting only the distinct ones).

The product of its digits is 259200, while the sum is 40.

The spelling of 663531422125 in words is "six hundred sixty-three billion, five hundred thirty-one million, four hundred twenty-two thousand, one hundred twenty-five".