61180657 has 2 divisors, whose sum is σ = 61180658. Its totient is φ = 61180656.

The previous prime is 61180601. The next prime is 61180663. The reversal of 61180657 is 75608116.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 59582961 + 1597696 = 7719^2 + 1264^2 .

It is a cyclic number.

It is not a de Polignac number, because 61180657 - 2²³ = 52792049 is a prime.

It is not a weakly prime, because it can be changed into another prime (61180687) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 30590328 + 30590329.

It is an arithmetic number, because the mean of its divisors is an integer number (30590329).

Almost surely, 2^61180657 is an apocalyptic number.

It is an amenable number.

61180657 is a deficient number, since it is larger than the sum of its proper divisors (1).

61180657 is an equidigital number, since it uses as much as digits as its factorization.

61180657 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 10080, while the sum is 34.

The square root of 61180657 is about 7821.8065048939. The cubic root of 61180657 is about 394.0379450172.

The spelling of 61180657 in words is "sixty-one million, one hundred eighty thousand, six hundred fifty-seven".