75447205725 has 48 divisors (see below), whose sum is σ = 132868245888. Its totient is φ = 37644656640.

The previous prime is 75447205723. The next prime is 75447205751. The reversal of 75447205725 is 52750274457.

It is a happy number.

It is not a de Polignac number, because 75447205725 - 2¹ = 75447205723 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (75447205721) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 35757 + ... + 390093.

It is an arithmetic number, because the mean of its divisors is an integer number (2768088456).

Almost surely, 2^75447205725 is an apocalyptic number.

75447205725 is a gapful number since it is divisible by the number (75) formed by its first and last digit.

It is an amenable number.

75447205725 is a deficient number, since it is larger than the sum of its proper divisors (57421040163).

75447205725 is a wasteful number, since it uses less digits than its factorization.

75447205725 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 354534 (or 354529 counting only the distinct ones).

The product of its (nonzero) digits is 2744000, while the sum is 48.

The spelling of 75447205725 in words is "seventy-five billion, four hundred forty-seven million, two hundred five thousand, seven hundred twenty-five".