61780525 has 12 divisors (see below), whose sum is σ = 76845652. Its totient is φ = 49271040.

The previous prime is 61780501. The next prime is 61780531. The reversal of 61780525 is 52508716.

It can be written as a sum of positive squares in 6 ways, for example, as 20448484 + 41332041 = 4522^2 + 6429^2 .

It is a de Polignac number, because none of the positive numbers 2^k-61780525 is a prime.

It is a hoax number, since the sum of its digits (34) coincides with the sum of the digits of its distinct prime factors.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 4759 + ... + 12091.

Almost surely, 2^61780525 is an apocalyptic number.

It is an amenable number.

61780525 is a deficient number, since it is larger than the sum of its proper divisors (15065127).

61780525 is a wasteful number, since it uses less digits than its factorization.

61780525 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7680 (or 7675 counting only the distinct ones).

The product of its (nonzero) digits is 16800, while the sum is 34.

The square root of 61780525 is about 7860.0588420189. The cubic root of 61780525 is about 395.3215882396.

The spelling of 61780525 in words is "sixty-one million, seven hundred eighty thousand, five hundred twenty-five".