63221361645 has 16 divisors (see below), whose sum is σ = 108935269632. Its totient is φ = 31124362560.

The previous prime is 63221361601. The next prime is 63221361661. The reversal of 63221361645 is 54616312236.

It is not a de Polignac number, because 63221361645 - 2²³ = 63212973037 is a prime.

It is a super-3 number, since 3×63221361645³ (a number of 33 digits) contains 333 as substring.

It is a Harshad number since it is a multiple of its sum of digits (39).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 162105861 + ... + 162106250.

It is an arithmetic number, because the mean of its divisors is an integer number (6808454352).

Almost surely, 2^63221361645 is an apocalyptic number.

63221361645 is a gapful number since it is divisible by the number (65) formed by its first and last digit.

It is an amenable number.

63221361645 is a deficient number, since it is larger than the sum of its proper divisors (45713907987).

63221361645 is a wasteful number, since it uses less digits than its factorization.

63221361645 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 324212132.

The product of its digits is 155520, while the sum is 39.

The spelling of 63221361645 in words is "sixty-three billion, two hundred twenty-one million, three hundred sixty-one thousand, six hundred forty-five".