16409251399 has 8 divisors (see below), whose sum is σ = 17132687712. Its totient is φ = 15686647680.

The previous prime is 16409251393. The next prime is 16409251427. The reversal of 16409251399 is 99315290461.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 16409251399 - 2⁵ = 16409251367 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 (16409251393) 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, 167694 + ... + 246859.

It is an arithmetic number, because the mean of its divisors is an integer number (2141585964).

Almost surely, 2^16409251399 is an apocalyptic number.

16409251399 is a deficient number, since it is larger than the sum of its proper divisors (723436313).

16409251399 is a wasteful number, since it uses less digits than its factorization.

16409251399 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 416297.

The product of its (nonzero) digits is 524880, while the sum is 49.

The spelling of 16409251399 in words is "sixteen billion, four hundred nine million, two hundred fifty-one thousand, three hundred ninety-nine".