123555740377 has 2 divisors, whose sum is σ = 123555740378. Its totient is φ = 123555740376.

The previous prime is 123555740267. The next prime is 123555740381. The reversal of 123555740377 is 773047555321.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 120550617616 + 3005122761 = 347204^2 + 54819^2 .

It is a cyclic number.

It is not a de Polignac number, because 123555740377 - 2¹⁵ = 123555707609 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 123555740377.

It is not a weakly prime, because it can be changed into another prime (123555720377) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 61777870188 + 61777870189.

It is an arithmetic number, because the mean of its divisors is an integer number (61777870189).

Almost surely, 2^123555740377 is an apocalyptic number.

It is an amenable number.

123555740377 is a deficient number, since it is larger than the sum of its proper divisors (1).

123555740377 is an equidigital number, since it uses as much as digits as its factorization.

123555740377 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 3087000, while the sum is 49.

The spelling of 123555740377 in words is "one hundred twenty-three billion, five hundred fifty-five million, seven hundred forty thousand, three hundred seventy-seven".