1612123154381 has 2 divisors, whose sum is σ = 1612123154382. Its totient is φ = 1612123154380.

The previous prime is 1612123154377. The next prime is 1612123154419. The reversal of 1612123154381 is 1834513212161.

It is an a-pointer prime, because the next prime (1612123154419) can be obtained adding 1612123154381 to its sum of digits (38).

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 1180025964100 + 432097190281 = 1086290^2 + 657341^2 .

It is a cyclic number.

It is not a de Polignac number, because 1612123154381 - 2² = 1612123154377 is a prime.

It is a super-2 number, since 2×1612123154381² (a number of 25 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1612123154981) 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, 806061577190 + 806061577191.

It is an arithmetic number, because the mean of its divisors is an integer number (806061577191).

Almost surely, 2^{1612123154381} is an apocalyptic number.

It is an amenable number.

1612123154381 is a deficient number, since it is larger than the sum of its proper divisors (1).

1612123154381 is an equidigital number, since it uses as much as digits as its factorization.

1612123154381 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 34560, while the sum is 38.

The spelling of 1612123154381 in words is "one trillion, six hundred twelve billion, one hundred twenty-three million, one hundred fifty-four thousand, three hundred eighty-one".