16042191577 has 8 divisors (see below), whose sum is σ = 16286899464. Its totient is φ = 15798158208.

The previous prime is 16042191553. The next prime is 16042191637. The reversal of 16042191577 is 77519124061.

It is a happy number.

It can be written as a sum of positive squares in 4 ways, for example, as 1355417856 + 14686773721 = 36816^2 + 121189^2 .

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

It is a cyclic number.

It is not a de Polignac number, because 16042191577 - 2²⁷ = 15907973849 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (16042192577) 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, 120598 + ... + 215935.

It is an arithmetic number, because the mean of its divisors is an integer number (2035862433).

Almost surely, 2^16042191577 is an apocalyptic number.

It is an amenable number.

16042191577 is a deficient number, since it is larger than the sum of its proper divisors (244707887).

16042191577 is an equidigital number, since it uses as much as digits as its factorization.

16042191577 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 337259.

The product of its (nonzero) digits is 105840, while the sum is 43.

The spelling of 16042191577 in words is "sixteen billion, forty-two million, one hundred ninety-one thousand, five hundred seventy-seven".