16225731994 has 16 divisors (see below), whose sum is σ = 24407202600. Its totient is φ = 8090025984.

The previous prime is 16225731959. The next prime is 16225731997. The reversal of 16225731994 is 49913752261.

It can be written as a sum of positive squares in 4 ways, for example, as 14746944969 + 1478787025 = 121437^2 + 38455^2 .

It is a super-2 number, since 2×16225731994² (a number of 21 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (16225731997) 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, 1314202 + ... + 1326490.

Almost surely, 2^16225731994 is an apocalyptic number.

16225731994 is a deficient number, since it is larger than the sum of its proper divisors (8181470606).

16225731994 is a wasteful number, since it uses less digits than its factorization.

16225731994 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 14097.

The product of its digits is 816480, while the sum is 49.

The spelling of 16225731994 in words is "sixteen billion, two hundred twenty-five million, seven hundred thirty-one thousand, nine hundred ninety-four".