16377556399 has 8 divisors (see below), whose sum is σ = 16657963520. Its totient is φ = 16099515936.

The previous prime is 16377556379. The next prime is 16377556417. The reversal of 16377556399 is 99365577361.

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-16377556399 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 (16377556379) 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, 577704 + ... + 605389.

It is an arithmetic number, because the mean of its divisors is an integer number (2082245440).

Almost surely, 2^16377556399 is an apocalyptic number.

16377556399 is a deficient number, since it is larger than the sum of its proper divisors (280407121).

16377556399 is a wasteful number, since it uses less digits than its factorization.

16377556399 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1183329.

The product of its digits is 32148900, while the sum is 61.

The spelling of 16377556399 in words is "sixteen billion, three hundred seventy-seven million, five hundred fifty-six thousand, three hundred ninety-nine".