83780527825 has 6 divisors (see below), whose sum is σ = 103887854534. Its totient is φ = 67024422240.

The previous prime is 83780527741. The next prime is 83780527829. The reversal of 83780527825 is 52872508738.

It can be written as a sum of positive squares in 3 ways, for example, as 1467196416 + 82313331409 = 38304^2 + 286903^2 .

It is a de Polignac number, because none of the positive numbers 2^k-83780527825 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (83780527829) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 1675610532 + ... + 1675610581.

Almost surely, 2^83780527825 is an apocalyptic number.

It is an amenable number.

83780527825 is a deficient number, since it is larger than the sum of its proper divisors (20107326709).

83780527825 is a wasteful number, since it uses less digits than its factorization.

83780527825 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3351221123 (or 3351221118 counting only the distinct ones).

The product of its (nonzero) digits is 7526400, while the sum is 55.

The spelling of 83780527825 in words is "eighty-three billion, seven hundred eighty million, five hundred twenty-seven thousand, eight hundred twenty-five".