15553150561 has 8 divisors (see below), whose sum is σ = 16978993640. Its totient is φ = 14160085632.

The previous prime is 15553150513. The next prime is 15553150579. The reversal of 15553150561 is 16505135551.

It can be written as a sum of positive squares in 4 ways, for example, as 354945600 + 15198204961 = 18840^2 + 123281^2 .

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 15553150561 - 2⁷ = 15553150433 is a prime.

It is a super-2 number, since 2×15553150561² (a number of 21 digits) contains 22 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 15553150561.

It is not an unprimeable number, because it can be changed into a prime (15553150661) 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, 8193546 + ... + 8195443.

It is an arithmetic number, because the mean of its divisors is an integer number (2122374205).

Almost surely, 2^15553150561 is an apocalyptic number.

It is an amenable number.

15553150561 is a deficient number, since it is larger than the sum of its proper divisors (1425843079).

15553150561 is a wasteful number, since it uses less digits than its factorization.

15553150561 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 16389075.

The product of its (nonzero) digits is 56250, while the sum is 37.

The spelling of 15553150561 in words is "fifteen billion, five hundred fifty-three million, one hundred fifty thousand, five hundred sixty-one".