15797661 has 16 divisors (see below), whose sum is σ = 23086080. Its totient is φ = 9529520.

The previous prime is 15797659. The next prime is 15797671. The reversal of 15797661 is 16679751.

It is not a de Polignac number, because 15797661 - 2¹ = 15797659 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (15797671) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 6886 + ... + 8888.

It is an arithmetic number, because the mean of its divisors is an integer number (1442880).

Almost surely, 2^15797661 is an apocalyptic number.

15797661 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

It is an amenable number.

15797661 is a deficient number, since it is larger than the sum of its proper divisors (7288419).

15797661 is a wasteful number, since it uses less digits than its factorization.

15797661 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2256.

The product of its digits is 79380, while the sum is 42.

The square root of 15797661 is about 3974.6271523251. The cubic root of 15797661 is about 250.9174874150.

The spelling of 15797661 in words is "fifteen million, seven hundred ninety-seven thousand, six hundred sixty-one".