16040302665 has 32 divisors (see below), whose sum is σ = 26823242880. Its totient is φ = 8174659584.

The previous prime is 16040302661. The next prime is 16040302667. The reversal of 16040302665 is 56620304061.

It is not a de Polignac number, because 16040302665 - 2² = 16040302661 is a prime.

It is a super-2 number, since 2×16040302665² (a number of 21 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (16040302661) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 147879 + ... + 232268.

It is an arithmetic number, because the mean of its divisors is an integer number (838226340).

Almost surely, 2^16040302665 is an apocalyptic number.

16040302665 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

16040302665 is a deficient number, since it is larger than the sum of its proper divisors (10782940215).

16040302665 is a wasteful number, since it uses less digits than its factorization.

16040302665 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 380281.

The product of its (nonzero) digits is 25920, while the sum is 33.

The spelling of 16040302665 in words is "sixteen billion, forty million, three hundred two thousand, six hundred sixty-five".