16077507205661 has 8 divisors (see below), whose sum is σ = 17540748704448. Its totient is φ = 14614540696000.

The previous prime is 16077507205577. The next prime is 16077507205667. The reversal of 16077507205661 is 16650270577061.

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-16077507205661 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 (16077507205667) 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, 68625020 + ... + 68858901.

It is an arithmetic number, because the mean of its divisors is an integer number (2192593588056).

Almost surely, 2^{16077507205661} is an apocalyptic number.

16077507205661 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

It is an amenable number.

16077507205661 is a deficient number, since it is larger than the sum of its proper divisors (1463241498787).

16077507205661 is a wasteful number, since it uses less digits than its factorization.

16077507205661 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 137494563.

The product of its (nonzero) digits is 3704400, while the sum is 53.

The spelling of 16077507205661 in words is "sixteen trillion, seventy-seven billion, five hundred seven million, two hundred five thousand, six hundred sixty-one".