61528757 has 2 divisors, whose sum is σ = 61528758. Its totient is φ = 61528756.

The previous prime is 61528723. The next prime is 61528759. The reversal of 61528757 is 75782516.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 54081316 + 7447441 = 7354^2 + 2729^2 .

It is a cyclic number.

It is not a de Polignac number, because 61528757 - 2⁸ = 61528501 is a prime.

Together with 61528759, it forms a pair of twin primes.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (61528759) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 30764378 + 30764379.

It is an arithmetic number, because the mean of its divisors is an integer number (30764379).

Almost surely, 2^61528757 is an apocalyptic number.

It is an amenable number.

61528757 is a deficient number, since it is larger than the sum of its proper divisors (1).

61528757 is an equidigital number, since it uses as much as digits as its factorization.

61528757 is an evil number, because the sum of its binary digits is even.

The product of its digits is 117600, while the sum is 41.

The square root of 61528757 is about 7844.0268357522. The cubic root of 61528757 is about 394.7838522610.

The spelling of 61528757 in words is "sixty-one million, five hundred twenty-eight thousand, seven hundred fifty-seven".