15540345259 has 2 divisors, whose sum is σ = 15540345260. Its totient is φ = 15540345258.

The previous prime is 15540345199. The next prime is 15540345341. The reversal of 15540345259 is 95254304551.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 15540345259 - 2⁷ = 15540345131 is a prime.

It is a super-3 number, since 3×15540345259³ (a number of 32 digits) contains 333 as substring.

It is not a weakly prime, because it can be changed into another prime (15540345859) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 7770172629 + 7770172630.

It is an arithmetic number, because the mean of its divisors is an integer number (7770172630).

Almost surely, 2^15540345259 is an apocalyptic number.

15540345259 is a deficient number, since it is larger than the sum of its proper divisors (1).

15540345259 is an equidigital number, since it uses as much as digits as its factorization.

15540345259 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 540000, while the sum is 43.

The spelling of 15540345259 in words is "fifteen billion, five hundred forty million, three hundred forty-five thousand, two hundred fifty-nine".