63406036544 has 14 divisors (see below), whose sum is σ = 125821353894. Its totient is φ = 31703018240.

The previous prime is 63406036511. The next prime is 63406036571. The reversal of 63406036544 is 44563060436.

It can be written as a sum of positive squares in only one way, i.e., 49500910144 + 13905126400 = 222488^2 + 117920^2 .

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 495359597 + ... + 495359724.

Almost surely, 2^63406036544 is an apocalyptic number.

63406036544 is a gapful number since it is divisible by the number (64) formed by its first and last digit.

It is an amenable number.

63406036544 is a deficient number, since it is larger than the sum of its proper divisors (62415317350).

63406036544 is an equidigital number, since it uses as much as digits as its factorization.

63406036544 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 990719333 (or 990719323 counting only the distinct ones).

The product of its (nonzero) digits is 622080, while the sum is 41.

The spelling of 63406036544 in words is "sixty-three billion, four hundred six million, thirty-six thousand, five hundred forty-four".