1545621160637 has 2 divisors, whose sum is σ = 1545621160638. Its totient is φ = 1545621160636.

The previous prime is 1545621160619. The next prime is 1545621160639. The reversal of 1545621160637 is 7360611265451.

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., 1471674691876 + 73946468761 = 1213126^2 + 271931^2 .

It is an emirp because it is prime and its reverse (7360611265451) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 1545621160637 - 2¹⁴ = 1545621144253 is a prime.

Together with 1545621160639, it forms a pair of twin primes.

It is a Chen prime.

It is a junction number, because it is equal to n+sod(n) for n = 1545621160591 and 1545621160600.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1545621160639) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 772810580318 + 772810580319.

It is an arithmetic number, because the mean of its divisors is an integer number (772810580319).

Almost surely, 2^{1545621160637} is an apocalyptic number.

It is an amenable number.

1545621160637 is a deficient number, since it is larger than the sum of its proper divisors (1).

1545621160637 is an equidigital number, since it uses as much as digits as its factorization.

1545621160637 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 907200, while the sum is 47.

The spelling of 1545621160637 in words is "one trillion, five hundred forty-five billion, six hundred twenty-one million, one hundred sixty thousand, six hundred thirty-seven".