15151015661 has 4 divisors (see below), whose sum is σ = 15152200992. Its totient is φ = 15149830332.

The previous prime is 15151015657. The next prime is 15151015679. The reversal of 15151015661 is 16651015151.

15151015661 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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 15151015661 - 2² = 15151015657 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (15151015261) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 573281 + ... + 599126.

It is an arithmetic number, because the mean of its divisors is an integer number (3788050248).

Almost surely, 2^15151015661 is an apocalyptic number.

It is an amenable number.

15151015661 is a deficient number, since it is larger than the sum of its proper divisors (1185331).

15151015661 is a wasteful number, since it uses less digits than its factorization.

15151015661 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1185330.

The product of its (nonzero) digits is 4500, while the sum is 32.

The spelling of 15151015661 in words is "fifteen billion, one hundred fifty-one million, fifteen thousand, six hundred sixty-one".