64138306748 has 12 divisors (see below), whose sum is σ = 113503183920. Its totient is φ = 31708825632.

The previous prime is 64138306733. The next prime is 64138306753. The reversal of 64138306748 is 84760383146.

It is a super-2 number, since 2×64138306748² (a number of 22 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 64138306696 and 64138306705.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 90081536 + ... + 90082247.

It is an arithmetic number, because the mean of its divisors is an integer number (9458598660).

Almost surely, 2^64138306748 is an apocalyptic number.

It is an amenable number.

64138306748 is a deficient number, since it is larger than the sum of its proper divisors (49364877172).

64138306748 is a wasteful number, since it uses less digits than its factorization.

64138306748 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 180163876 (or 180163874 counting only the distinct ones).

The product of its (nonzero) digits is 2322432, while the sum is 50.

The spelling of 64138306748 in words is "sixty-four billion, one hundred thirty-eight million, three hundred six thousand, seven hundred forty-eight".