64125050644 has 12 divisors (see below), whose sum is σ = 112265828500. Its totient is φ = 32049099648.

The previous prime is 64125050611. The next prime is 64125050659. The reversal of 64125050644 is 44605052146.

It can be written as a sum of positive squares in 2 ways, for example, as 43572387600 + 20552663044 = 208740^2 + 143362^2 .

It is a super-2 number, since 2×64125050644² (a number of 22 digits) contains 22 as substring.

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, 3345669 + ... + 3364780.

Almost surely, 2^64125050644 is an apocalyptic number.

It is an amenable number.

64125050644 is a deficient number, since it is larger than the sum of its proper divisors (48140777856).

64125050644 is a wasteful number, since it uses less digits than its factorization.

64125050644 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6712842 (or 6712840 counting only the distinct ones).

The product of its (nonzero) digits is 115200, while the sum is 37.

The spelling of 64125050644 in words is "sixty-four billion, one hundred twenty-five million, fifty thousand, six hundred forty-four".