145621438946869 has 2 divisors, whose sum is σ = 145621438946870. Its totient is φ = 145621438946868.

The previous prime is 145621438946833. The next prime is 145621438946903. The reversal of 145621438946869 is 968649834126541.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 141480010444369 + 4141428502500 = 11894537^2 + 2035050^2 .

It is a cyclic number.

It is not a de Polignac number, because 145621438946869 - 2⁴⁵ = 110437066858037 is a prime.

It is a super-2 number, since 2×145621438946869² (a number of 29 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 145621438946795 and 145621438946804.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (145621438946369) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 72810719473434 + 72810719473435.

It is an arithmetic number, because the mean of its divisors is an integer number (72810719473435).

Almost surely, 2^{145621438946869} is an apocalyptic number.

It is an amenable number.

145621438946869 is a deficient number, since it is larger than the sum of its proper divisors (1).

145621438946869 is an equidigital number, since it uses as much as digits as its factorization.

145621438946869 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 2149908480, while the sum is 76.

The spelling of 145621438946869 in words is "one hundred forty-five trillion, six hundred twenty-one billion, four hundred thirty-eight million, nine hundred forty-six thousand, eight hundred sixty-nine".