630406253640 has 32 divisors (see below), whose sum is σ = 1891218761280. Its totient is φ = 168108334272.

The previous prime is 630406253563. The next prime is 630406253647. The reversal of 630406253640 is 46352604036.

It is not an unprimeable number, because it can be changed into a prime (630406253647) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2626692604 + ... + 2626692843.

It is an arithmetic number, because the mean of its divisors is an integer number (59100586290).

Almost surely, 2^630406253640 is an apocalyptic number.

630406253640 is a gapful number since it is divisible by the number (60) formed by its first and last digit.

It is an amenable number.

630406253640 is an abundant number, since it is smaller than the sum of its proper divisors (1260812507640).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

630406253640 is a wasteful number, since it uses less digits than its factorization.

630406253640 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5253385461 (or 5253385457 counting only the distinct ones).

The product of its (nonzero) digits is 311040, while the sum is 39.

Adding to 630406253640 its reverse (46352604036), we get a palindrome (676758857676).

The spelling of 630406253640 in words is "six hundred thirty billion, four hundred six million, two hundred fifty-three thousand, six hundred forty".