73261831638157 has 2 divisors, whose sum is σ = 73261831638158. Its totient is φ = 73261831638156.

The previous prime is 73261831638097. The next prime is 73261831638169. The reversal of 73261831638157 is 75183613816237.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 46149930303876 + 27111901334281 = 6793374^2 + 5206909^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-73261831638157 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 73261831638095 and 73261831638104.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (73261831638187) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 36630915819078 + 36630915819079.

It is an arithmetic number, because the mean of its divisors is an integer number (36630915819079).

Almost surely, 2^{73261831638157} is an apocalyptic number.

It is an amenable number.

73261831638157 is a deficient number, since it is larger than the sum of its proper divisors (1).

73261831638157 is an equidigital number, since it uses as much as digits as its factorization.

73261831638157 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 30481920, while the sum is 61.

The spelling of 73261831638157 in words is "seventy-three trillion, two hundred sixty-one billion, eight hundred thirty-one million, six hundred thirty-eight thousand, one hundred fifty-seven".