155465744321 has 2 divisors, whose sum is σ = 155465744322. Its totient is φ = 155465744320.

The previous prime is 155465744309. The next prime is 155465744351. The reversal of 155465744321 is 123447564551.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 150098130625 + 5367613696 = 387425^2 + 73264^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-155465744321 is a prime.

It is not a weakly prime, because it can be changed into another prime (155465744351) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 77732872160 + 77732872161.

It is an arithmetic number, because the mean of its divisors is an integer number (77732872161).

Almost surely, 2^155465744321 is an apocalyptic number.

It is an amenable number.

155465744321 is a deficient number, since it is larger than the sum of its proper divisors (1).

155465744321 is an equidigital number, since it uses as much as digits as its factorization.

155465744321 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 2016000, while the sum is 47.

The spelling of 155465744321 in words is "one hundred fifty-five billion, four hundred sixty-five million, seven hundred forty-four thousand, three hundred twenty-one".