15770328661 has 4 divisors (see below), whose sum is σ = 15923438752. Its totient is φ = 15617218572.

The previous prime is 15770328659. The next prime is 15770328667. The reversal of 15770328661 is 16682307751.

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 15770328661 - 2¹ = 15770328659 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 (15770328667) 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, 76554891 + ... + 76555096.

It is an arithmetic number, because the mean of its divisors is an integer number (3980859688).

Almost surely, 2^15770328661 is an apocalyptic number.

It is an amenable number.

15770328661 is a deficient number, since it is larger than the sum of its proper divisors (153110091).

15770328661 is a wasteful number, since it uses less digits than its factorization.

15770328661 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 153110090.

The product of its (nonzero) digits is 423360, while the sum is 46.

The spelling of 15770328661 in words is "fifteen billion, seven hundred seventy million, three hundred twenty-eight thousand, six hundred sixty-one".