63490351680 has 504 divisors, whose sum is σ = 252928233792. Its totient is φ = 14319286272.

The previous prime is 63490351669. The next prime is 63490351697. The reversal of 63490351680 is 8615309436.

63490351680 is a `hidden beast` number, since 634 + 9 + 0 + 3 + 5 + 1 + 6 + 8 + 0 = 666.

It is a tau number, because it is divible by the number of its divisors (504).

It is a Harshad number since it is a multiple of its sum of digits (45).

It is an unprimeable number.

It is a polite number, since it can be written in 71 ways as a sum of consecutive naturals, for example, 389511279 + ... + 389511441.

Almost surely, 2^63490351680 is an apocalyptic number.

63490351680 is a gapful number since it is divisible by the number (60) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 63490351680, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (126464116896).

63490351680 is an abundant number, since it is smaller than the sum of its proper divisors (189437882112).

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

63490351680 is a wasteful number, since it uses less digits than its factorization.

63490351680 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 471 (or 319 counting only the distinct ones).

The product of its (nonzero) digits is 466560, while the sum is 45.

The spelling of 63490351680 in words is "sixty-three billion, four hundred ninety million, three hundred fifty-one thousand, six hundred eighty".