60644111640 has 128 divisors (see below), whose sum is σ = 208078709760. Its totient is φ = 13851108864.

The previous prime is 60644111623. The next prime is 60644111699. The reversal of 60644111640 is 4611144606.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 1121874 + ... + 1174686.

It is an arithmetic number, because the mean of its divisors is an integer number (1625614920).

Almost surely, 2^60644111640 is an apocalyptic number.

60644111640 is a gapful number since it is divisible by the number (60) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 60644111640, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (104039354880).

60644111640 is an abundant number, since it is smaller than the sum of its proper divisors (147434598120).

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

60644111640 is a wasteful number, since it uses less digits than its factorization.

60644111640 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 54201 (or 54197 counting only the distinct ones).

The product of its (nonzero) digits is 13824, while the sum is 33.

The spelling of 60644111640 in words is "sixty billion, six hundred forty-four million, one hundred eleven thousand, six hundred forty".