63251778 has 16 divisors (see below), whose sum is σ = 127470816. Its totient is φ = 20922720.

The previous prime is 63251777. The next prime is 63251791. The reversal of 63251778 is 87715236.

It is a super-2 number, since 2×63251778² = 8001574840322568, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (63251777) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 39451 + ... + 41022.

It is an arithmetic number, because the mean of its divisors is an integer number (7966926).

Almost surely, 2^63251778 is an apocalyptic number.

63251778 is an abundant number, since it is smaller than the sum of its proper divisors (64219038).

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

63251778 is a wasteful number, since it uses less digits than its factorization.

63251778 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 80609.

The product of its digits is 70560, while the sum is 39.

The square root of 63251778 is about 7953.0986414102. The cubic root of 63251778 is about 398.4350897909.

The spelling of 63251778 in words is "sixty-three million, two hundred fifty-one thousand, seven hundred seventy-eight".