63340620644 has 48 divisors (see below), whose sum is σ = 139146470400. Its totient is φ = 24599098656.

The previous prime is 63340620583. The next prime is 63340620647. The reversal of 63340620644 is 44602604336.

It is a super-4 number, since 4×63340620644⁴ (a number of 44 digits) contains 4444 as substring.

It is a Harshad number since it is a multiple of its sum of digits (38).

It is a junction number, because it is equal to n+sod(n) for n = 63340620598 and 63340620607.

It is not an unprimeable number, because it can be changed into a prime (63340620647) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 2576054 + ... + 2600525.

It is an arithmetic number, because the mean of its divisors is an integer number (2898884800).

Almost surely, 2^63340620644 is an apocalyptic number.

It is an amenable number.

63340620644 is an abundant number, since it is smaller than the sum of its proper divisors (75805849756).

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

63340620644 is a wasteful number, since it uses less digits than its factorization.

63340620644 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5176632 (or 5176630 counting only the distinct ones).

The product of its (nonzero) digits is 248832, while the sum is 38.

The spelling of 63340620644 in words is "sixty-three billion, three hundred forty million, six hundred twenty thousand, six hundred forty-four".