64863029644 has 48 divisors (see below), whose sum is σ = 139948699968. Its totient is φ = 25669582848.

The previous prime is 64863029603. The next prime is 64863029677. The reversal of 64863029644 is 44692036846.

It is a super-2 number, since 2×64863029644² (a number of 22 digits) contains 22 as substring.

It is a Smith number, since the sum of its digits (52) coincides with the sum of the digits of its prime factors.

It is a junction number, because it is equal to n+sod(n) for n = 64863029591 and 64863029600.

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, 1260309 + ... + 1310764.

It is an arithmetic number, because the mean of its divisors is an integer number (2915597916).

Almost surely, 2^64863029644 is an apocalyptic number.

It is an amenable number.

64863029644 is an abundant number, since it is smaller than the sum of its proper divisors (75085670324).

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

64863029644 is a wasteful number, since it uses less digits than its factorization.

64863029644 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2571154 (or 2571152 counting only the distinct ones).

The product of its (nonzero) digits is 5971968, while the sum is 52.

It can be divided in two parts, 6486302 and 9644, that added together give a palindrome (6495946).

The spelling of 64863029644 in words is "sixty-four billion, eight hundred sixty-three million, twenty-nine thousand, six hundred forty-four".