63451990 has 64 divisors (see below), whose sum is σ = 140341248. Its totient is φ = 20160000.

The previous prime is 63451967. The next prime is 63451991. The reversal of 63451990 is 9915436.

63451990 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (63451991) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 84115 + ... + 84865.

It is an arithmetic number, because the mean of its divisors is an integer number (2192832).

Almost surely, 2^63451990 is an apocalyptic number.

63451990 is an abundant number, since it is smaller than the sum of its proper divisors (76889258).

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

63451990 is a wasteful number, since it uses less digits than its factorization.

63451990 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 853.

The product of its (nonzero) digits is 29160, while the sum is 37.

The square root of 63451990 is about 7965.6757403249. The cubic root of 63451990 is about 398.8550382837.

The spelling of 63451990 in words is "sixty-three million, four hundred fifty-one thousand, nine hundred ninety".