16405824425 has 12 divisors (see below), whose sum is σ = 20344871580. Its totient is φ = 13123595520.

The previous prime is 16405824403. The next prime is 16405824437. The reversal of 16405824425 is 52442850461.

It can be written as a sum of positive squares in 6 ways, for example, as 628454761 + 15777369664 = 25069^2 + 125608^2 .

It is not a de Polignac number, because 16405824425 - 2⁶ = 16405824361 is a prime.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 468941 + ... + 502709.

It is an arithmetic number, because the mean of its divisors is an integer number (1695405965).

Almost surely, 2^16405824425 is an apocalyptic number.

It is an amenable number.

16405824425 is a deficient number, since it is larger than the sum of its proper divisors (3939047155).

16405824425 is a wasteful number, since it uses less digits than its factorization.

16405824425 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 53212 (or 53207 counting only the distinct ones).

The product of its (nonzero) digits is 307200, while the sum is 41.

The spelling of 16405824425 in words is "sixteen billion, four hundred five million, eight hundred twenty-four thousand, four hundred twenty-five".