15514605661 has 4 divisors (see below), whose sum is σ = 15514934400. Its totient is φ = 15514276924.

The previous prime is 15514605653. The next prime is 15514605703. The reversal of 15514605661 is 16650641551.

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.

It is a cyclic number.

It is not a de Polignac number, because 15514605661 - 2³ = 15514605653 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (15514605461) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 78691 + ... + 192928.

It is an arithmetic number, because the mean of its divisors is an integer number (3878733600).

Almost surely, 2^15514605661 is an apocalyptic number.

It is an amenable number.

15514605661 is a deficient number, since it is larger than the sum of its proper divisors (328739).

15514605661 is an equidigital number, since it uses as much as digits as its factorization.

15514605661 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 328738.

The product of its (nonzero) digits is 108000, while the sum is 40.

The spelling of 15514605661 in words is "fifteen billion, five hundred fourteen million, six hundred five thousand, six hundred sixty-one".