6406925785 has 16 divisors (see below), whose sum is σ = 8283179520. Its totient is φ = 4729291200.

The previous prime is 6406925783. The next prime is 6406925801. The reversal of 6406925785 is 5875296046.

It is not a de Polignac number, because 6406925785 - 2¹ = 6406925783 is a prime.

It is not an unprimeable number, because it can be changed into a prime (6406925783) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 146496 + ... + 185134.

It is an arithmetic number, because the mean of its divisors is an integer number (517698720).

Almost surely, 2^6406925785 is an apocalyptic number.

6406925785 is a gapful number since it is divisible by the number (65) formed by its first and last digit.

It is an amenable number.

6406925785 is a deficient number, since it is larger than the sum of its proper divisors (1876253735).

6406925785 is a wasteful number, since it uses less digits than its factorization.

6406925785 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 41208.

The product of its (nonzero) digits is 3628800, while the sum is 52.

The square root of 6406925785 is about 80043.2744520113. The cubic root of 6406925785 is about 1857.3050138079.

The spelling of 6406925785 in words is "six billion, four hundred six million, nine hundred twenty-five thousand, seven hundred eighty-five".