16400261499 has 8 divisors (see below), whose sum is σ = 21958510080. Its totient is φ = 10887760296.

The previous prime is 16400261497. The next prime is 16400261557. The reversal of 16400261499 is 99416200461.

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

It is not a de Polignac number, because 16400261499 - 2¹ = 16400261497 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 16400261499.

It is not an unprimeable number, because it can be changed into a prime (16400261497) 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, 11436007 + ... + 11437440.

It is an arithmetic number, because the mean of its divisors is an integer number (2744813760).

Almost surely, 2^16400261499 is an apocalyptic number.

16400261499 is a deficient number, since it is larger than the sum of its proper divisors (5558248581).

16400261499 is a wasteful number, since it uses less digits than its factorization.

16400261499 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 22873689.

The product of its (nonzero) digits is 93312, while the sum is 42.

The spelling of 16400261499 in words is "sixteen billion, four hundred million, two hundred sixty-one thousand, four hundred ninety-nine".