63493920400 has 135 divisors (see below), whose sum is σ = 156709019739. Its totient is φ = 24722261760.

The previous prime is 63493920367. The next prime is 63493920431. The reversal of 63493920400 is 402939436.

The square root of 63493920400 is 251980.

It is a perfect power (a square), and thus also a powerful number.

It can be written as a sum of positive squares in 4 ways, for example, as 10055276176 + 53438644224 = 100276^2 + 231168^2 .

It is a Harshad number since it is a multiple of its sum of digits (40).

It is a Duffinian number.

It is an unprimeable number.

It is a polite number, since it can be written in 26 ways as a sum of consecutive naturals, for example, 216702654 + ... + 216702946.

Almost surely, 2^63493920400 is an apocalyptic number.

63493920400 is the 251980-th square number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 63493920400

63493920400 is an abundant number, since it is smaller than the sum of its proper divisors (93215099339).

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

63493920400 is an equidigital number, since it uses as much as digits as its factorization.

63493920400 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 690 (or 343 counting only the distinct ones).

The product of its (nonzero) digits is 139968, while the sum is 40.

The spelling of 63493920400 in words is "sixty-three billion, four hundred ninety-three million, nine hundred twenty thousand, four hundred".