75381570644 has 12 divisors (see below), whose sum is σ = 131939736768. Its totient is φ = 37684503000.

The previous prime is 75381570617. The next prime is 75381570659. The reversal of 75381570644 is 44607518357.

It is a junction number, because it is equal to n+sod(n) for n = 75381570592 and 75381570601.

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, 1543532 + ... + 1591619.

It is an arithmetic number, because the mean of its divisors is an integer number (10994978064).

Almost surely, 2^75381570644 is an apocalyptic number.

It is an amenable number.

75381570644 is a deficient number, since it is larger than the sum of its proper divisors (56558166124).

75381570644 is a wasteful number, since it uses less digits than its factorization.

75381570644 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3141166 (or 3141164 counting only the distinct ones).

The product of its (nonzero) digits is 2822400, while the sum is 50.

The spelling of 75381570644 in words is "seventy-five billion, three hundred eighty-one million, five hundred seventy thousand, six hundred forty-four".