1423153565261 has 2 divisors, whose sum is σ = 1423153565262. Its totient is φ = 1423153565260.

The previous prime is 1423153565231. The next prime is 1423153565291. The reversal of 1423153565261 is 1625653513241.

It is a happy number.

It is a balanced prime because it is at equal distance from previous prime (1423153565231) and next prime (1423153565291).

It can be written as a sum of positive squares in only one way, i.e., 1158839332036 + 264314233225 = 1076494^2 + 514115^2 .

It is a cyclic number.

It is not a de Polignac number, because 1423153565261 - 2¹⁰ = 1423153564237 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1423153565231) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 711576782630 + 711576782631.

It is an arithmetic number, because the mean of its divisors is an integer number (711576782631).

Almost surely, 2^{1423153565261} is an apocalyptic number.

It is an amenable number.

1423153565261 is a deficient number, since it is larger than the sum of its proper divisors (1).

1423153565261 is an equidigital number, since it uses as much as digits as its factorization.

1423153565261 is an evil number, because the sum of its binary digits is even.

The product of its digits is 648000, while the sum is 44.

The spelling of 1423153565261 in words is "one trillion, four hundred twenty-three billion, one hundred fifty-three million, five hundred sixty-five thousand, two hundred sixty-one".