15606121541 has 8 divisors (see below), whose sum is σ = 15667522200. Its totient is φ = 15544840192.

The previous prime is 15606121493. The next prime is 15606121549. The reversal of 15606121541 is 14512160651.

It can be written as a sum of positive squares in 4 ways, for example, as 9124261441 + 6481860100 = 95521^2 + 80510^2 .

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-15606121541 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 15606121498 and 15606121507.

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 pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 236951 + ... + 295563.

It is an arithmetic number, because the mean of its divisors is an integer number (1958440275).

Almost surely, 2^15606121541 is an apocalyptic number.

It is an amenable number.

15606121541 is a deficient number, since it is larger than the sum of its proper divisors (61400659).

15606121541 is an equidigital number, since it uses as much as digits as its factorization.

15606121541 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 59655.

The product of its (nonzero) digits is 7200, while the sum is 32.

The spelling of 15606121541 in words is "fifteen billion, six hundred six million, one hundred twenty-one thousand, five hundred forty-one".