15540452145423 has 12 divisors (see below), whose sum is σ = 23221365275160. Its totient is φ = 10003049656656.

The previous prime is 15540452145419. The next prime is 15540452145497. The reversal of 15540452145423 is 32454125404551.

15540452145423 is a `hidden beast` number, since 1 + 5 + 5 + 4 + 0 + 4 + 5 + 214 + 5 + 423 = 666.

It is not a de Polignac number, because 15540452145423 - 2² = 15540452145419 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (15540452145403) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 29770980861 + ... + 29770981382.

It is an arithmetic number, because the mean of its divisors is an integer number (1935113772930).

Almost surely, 2^{15540452145423} is an apocalyptic number.

15540452145423 is a deficient number, since it is larger than the sum of its proper divisors (7680913129737).

15540452145423 is a wasteful number, since it uses less digits than its factorization.

15540452145423 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 59541962278 (or 59541962275 counting only the distinct ones).

The product of its (nonzero) digits is 1920000, while the sum is 45.

Adding to 15540452145423 its reverse (32454125404551), we get a palindrome (47994577549974).

The spelling of 15540452145423 in words is "fifteen trillion, five hundred forty billion, four hundred fifty-two million, one hundred forty-five thousand, four hundred twenty-three".