61761157 has 2 divisors, whose sum is σ = 61761158. Its totient is φ = 61761156.

The previous prime is 61761137. The next prime is 61761163. The reversal of 61761157 is 75116716.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 56535361 + 5225796 = 7519^2 + 2286^2 .

It is a cyclic number.

It is not a de Polignac number, because 61761157 - 2²³ = 53372549 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (61761127) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 30880578 + 30880579.

It is an arithmetic number, because the mean of its divisors is an integer number (30880579).

Almost surely, 2^61761157 is an apocalyptic number.

It is an amenable number.

61761157 is a deficient number, since it is larger than the sum of its proper divisors (1).

61761157 is an equidigital number, since it uses as much as digits as its factorization.

61761157 is an evil number, because the sum of its binary digits is even.

The product of its digits is 8820, while the sum is 34.

The square root of 61761157 is about 7858.8266935975. The cubic root of 61761157 is about 395.2802732310.

The spelling of 61761157 in words is "sixty-one million, seven hundred sixty-one thousand, one hundred fifty-seven".