1545334699421 has 2 divisors, whose sum is σ = 1545334699422. Its totient is φ = 1545334699420.

The previous prime is 1545334699379. The next prime is 1545334699429. The reversal of 1545334699421 is 1249964335451.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 1229406393796 + 315928305625 = 1108786^2 + 562075^2 .

It is a cyclic number.

It is not a de Polignac number, because 1545334699421 - 2⁶ = 1545334699357 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1545334699429) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 772667349710 + 772667349711.

It is an arithmetic number, because the mean of its divisors is an integer number (772667349711).

Almost surely, 2^{1545334699421} is an apocalyptic number.

It is an amenable number.

1545334699421 is a deficient number, since it is larger than the sum of its proper divisors (1).

1545334699421 is an equidigital number, since it uses as much as digits as its factorization.

1545334699421 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 13996800, while the sum is 56.

The spelling of 1545334699421 in words is "one trillion, five hundred forty-five billion, three hundred thirty-four million, six hundred ninety-nine thousand, four hundred twenty-one".