15545023350949 has 2 divisors, whose sum is σ = 15545023350950. Its totient is φ = 15545023350948.

The previous prime is 15545023350919. The next prime is 15545023351097. The reversal of 15545023350949 is 94905332054551.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 12197521325025 + 3347502025924 = 3492495^2 + 1829618^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-15545023350949 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 15545023350949.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (15545023350919) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 7772511675474 + 7772511675475.

It is an arithmetic number, because the mean of its divisors is an integer number (7772511675475).

Almost surely, 2^{15545023350949} is an apocalyptic number.

It is an amenable number.

15545023350949 is a deficient number, since it is larger than the sum of its proper divisors (1).

15545023350949 is an equidigital number, since it uses as much as digits as its factorization.

15545023350949 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 14580000, while the sum is 55.

The spelling of 15545023350949 in words is "fifteen trillion, five hundred forty-five billion, twenty-three million, three hundred fifty thousand, nine hundred forty-nine".