64800553 has 2 divisors, whose sum is σ = 64800554. Its totient is φ = 64800552.

The previous prime is 64800539. The next prime is 64800599. The reversal of 64800553 is 35500846.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 53758224 + 11042329 = 7332^2 + 3323^2 .

It is a cyclic number.

It is not a de Polignac number, because 64800553 - 2¹³ = 64792361 is a prime.

It is a super-2 number, since 2×64800553² = 8398223338211618, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (64800523) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 32400276 + 32400277.

It is an arithmetic number, because the mean of its divisors is an integer number (32400277).

Almost surely, 2^64800553 is an apocalyptic number.

It is an amenable number.

64800553 is a deficient number, since it is larger than the sum of its proper divisors (1).

64800553 is an equidigital number, since it uses as much as digits as its factorization.

64800553 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 14400, while the sum is 31.

The square root of 64800553 is about 8049.8790674146. The cubic root of 64800553 is about 401.6609126276.

The spelling of 64800553 in words is "sixty-four million, eight hundred thousand, five hundred fifty-three".