15355560061 has 4 divisors (see below), whose sum is σ = 15355824124. Its totient is φ = 15355296000.

The previous prime is 15355560043. The next prime is 15355560067. The reversal of 15355560061 is 16006555351.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 9744651225 + 5610908836 = 98715^2 + 74906^2 .

It is a cyclic number.

It is not a de Polignac number, because 15355560061 - 2¹¹ = 15355558013 is a prime.

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 15355560061.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (15355560067) 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, 2340 + ... + 175261.

It is an arithmetic number, because the mean of its divisors is an integer number (3838956031).

Almost surely, 2^15355560061 is an apocalyptic number.

It is an amenable number.

15355560061 is a deficient number, since it is larger than the sum of its proper divisors (264063).

15355560061 is an equidigital number, since it uses as much as digits as its factorization.

15355560061 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 264062.

The product of its (nonzero) digits is 67500, while the sum is 37.

The spelling of 15355560061 in words is "fifteen billion, three hundred fifty-five million, five hundred sixty thousand, sixty-one".