64142268752 has 20 divisors (see below), whose sum is σ = 124284364116. Its totient is φ = 32068884480.

The previous prime is 64142268721. The next prime is 64142268809. The reversal of 64142268752 is 25786224146.

It can be written as a sum of positive squares in 2 ways, for example, as 41085668416 + 23056600336 = 202696^2 + 151844^2 .

It is a super-2 number, since 2×64142268752² (a number of 22 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 64142268697 and 64142268706.

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, 107888 + ... + 374064.

Almost surely, 2^64142268752 is an apocalyptic number.

It is an amenable number.

64142268752 is a deficient number, since it is larger than the sum of its proper divisors (60142095364).

64142268752 is a wasteful number, since it uses less digits than its factorization.

64142268752 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 281246 (or 281240 counting only the distinct ones).

The product of its digits is 1290240, while the sum is 47.

The spelling of 64142268752 in words is "sixty-four billion, one hundred forty-two million, two hundred sixty-eight thousand, seven hundred fifty-two".