1375746644 has 48 divisors (see below), whose sum is σ = 2581641216. Its totient is φ = 640332000.

The previous prime is 1375746643. The next prime is 1375746649. The reversal of 1375746644 is 4466475731.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1375746643) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 355319 + ... + 359169.

It is an arithmetic number, because the mean of its divisors is an integer number (53784192).

Almost surely, 2^1375746644 is an apocalyptic number.

It is an amenable number.

1375746644 is a deficient number, since it is larger than the sum of its proper divisors (1205894572).

1375746644 is a wasteful number, since it uses less digits than its factorization.

1375746644 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3996 (or 3994 counting only the distinct ones).

The product of its digits is 1693440, while the sum is 47.

The square root of 1375746644 is about 37091.0588147602. The cubic root of 1375746644 is about 1112.1912841840.

The spelling of 1375746644 in words is "one billion, three hundred seventy-five million, seven hundred forty-six thousand, six hundred forty-four".