15555079261 has 4 divisors (see below), whose sum is σ = 15706099552. Its totient is φ = 15404058972.

The previous prime is 15555079181. The next prime is 15555079273. The reversal of 15555079261 is 16297055551.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also an emirpimes, since its reverse is a distinct semiprime: 16297055551 = 7 ⋅2328150793.

It is a cyclic number.

It is not a de Polignac number, because 15555079261 - 2¹⁹ = 15554554973 is a prime.

It is a super-2 number, since 2×15555079261² (a number of 21 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (15555079291) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 75509991 + ... + 75510196.

It is an arithmetic number, because the mean of its divisors is an integer number (3926524888).

Almost surely, 2^15555079261 is an apocalyptic number.

It is an amenable number.

15555079261 is a deficient number, since it is larger than the sum of its proper divisors (151020291).

15555079261 is a wasteful number, since it uses less digits than its factorization.

15555079261 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 151020290.

The product of its (nonzero) digits is 472500, while the sum is 46.

The spelling of 15555079261 in words is "fifteen billion, five hundred fifty-five million, seventy-nine thousand, two hundred sixty-one".