61411212157 has 2 divisors, whose sum is σ = 61411212158. Its totient is φ = 61411212156.

The previous prime is 61411212053. The next prime is 61411212223. The reversal of 61411212157 is 75121211416.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 61152838681 + 258373476 = 247291^2 + 16074^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-61411212157 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (61411212757) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 30705606078 + 30705606079.

It is an arithmetic number, because the mean of its divisors is an integer number (30705606079).

Almost surely, 2^61411212157 is an apocalyptic number.

It is an amenable number.

61411212157 is a deficient number, since it is larger than the sum of its proper divisors (1).

61411212157 is an equidigital number, since it uses as much as digits as its factorization.

61411212157 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 3360, while the sum is 31.

The spelling of 61411212157 in words is "sixty-one billion, four hundred eleven million, two hundred twelve thousand, one hundred fifty-seven".