15606121543 has 8 divisors (see below), whose sum is σ = 15752248160. Its totient is φ = 15460048800.

The previous prime is 15606121493. The next prime is 15606121549. The reversal of 15606121543 is 34512160651.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 15606121543 - 2¹⁷ = 15605990471 is a prime.

It is a super-2 number, since 2×15606121543² (a number of 21 digits) contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 15606121499 and 15606121508.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (15606121549) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 791521 + ... + 810997.

It is an arithmetic number, because the mean of its divisors is an integer number (1969031020).

Almost surely, 2^15606121543 is an apocalyptic number.

15606121543 is a deficient number, since it is larger than the sum of its proper divisors (146126617).

15606121543 is a wasteful number, since it uses less digits than its factorization.

15606121543 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 26937.

The product of its (nonzero) digits is 21600, while the sum is 34.

The spelling of 15606121543 in words is "fifteen billion, six hundred six million, one hundred twenty-one thousand, five hundred forty-three".