61755272123 has 2 divisors, whose sum is σ = 61755272124. Its totient is φ = 61755272122.

The previous prime is 61755272119. The next prime is 61755272179. The reversal of 61755272123 is 32127255716.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 61755272123 - 2² = 61755272119 is a prime.

It is a Sophie Germain prime.

It is not a weakly prime, because it can be changed into another prime (61355272123) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 30877636061 + 30877636062.

It is an arithmetic number, because the mean of its divisors is an integer number (30877636062).

Almost surely, 2^61755272123 is an apocalyptic number.

61755272123 is a deficient number, since it is larger than the sum of its proper divisors (1).

61755272123 is an equidigital number, since it uses as much as digits as its factorization.

61755272123 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 176400, while the sum is 41.

The spelling of 61755272123 in words is "sixty-one billion, seven hundred fifty-five million, two hundred seventy-two thousand, one hundred twenty-three".