15551361641 has 8 divisors (see below), whose sum is σ = 15758142720. Its totient is φ = 15344828928.

The previous prime is 15551361629. The next prime is 15551361667. The reversal of 15551361641 is 14616315551.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-15551361641 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 15551361595 and 15551361604.

It is not an unprimeable number, because it can be changed into a prime (15551364641) 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, 65705 + ... + 188201.

It is an arithmetic number, because the mean of its divisors is an integer number (1969767840).

Almost surely, 2^15551361641 is an apocalyptic number.

It is an amenable number.

15551361641 is a deficient number, since it is larger than the sum of its proper divisors (206781079).

15551361641 is a wasteful number, since it uses less digits than its factorization.

15551361641 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 124183.

The product of its digits is 54000, while the sum is 38.

The spelling of 15551361641 in words is "fifteen billion, five hundred fifty-one million, three hundred sixty-one thousand, six hundred forty-one".