1545655402639 has 2 divisors, whose sum is σ = 1545655402640. Its totient is φ = 1545655402638.

The previous prime is 1545655402579. The next prime is 1545655402649. The reversal of 1545655402639 is 9362045565451.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 1545655402639 - 2¹³ = 1545655394447 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 1545655402639.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1545655402649) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 772827701319 + 772827701320.

It is an arithmetic number, because the mean of its divisors is an integer number (772827701320).

Almost surely, 2^{1545655402639} is an apocalyptic number.

1545655402639 is a deficient number, since it is larger than the sum of its proper divisors (1).

1545655402639 is an equidigital number, since it uses as much as digits as its factorization.

1545655402639 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 19440000, while the sum is 55.

The spelling of 1545655402639 in words is "one trillion, five hundred forty-five billion, six hundred fifty-five million, four hundred two thousand, six hundred thirty-nine".