6406911625 has 64 divisors (see below), whose sum is σ = 8952353280. Its totient is φ = 4554950400.

The previous prime is 6406911547. The next prime is 6406911631. The reversal of 6406911625 is 5261196046.

It is a happy number.

It is not a de Polignac number, because 6406911625 - 2²¹ = 6404814473 is a prime.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 2894019 + ... + 2896231.

It is an arithmetic number, because the mean of its divisors is an integer number (139880520).

Almost surely, 2^6406911625 is an apocalyptic number.

It is an amenable number.

6406911625 is a deficient number, since it is larger than the sum of its proper divisors (2545441655).

6406911625 is a wasteful number, since it uses less digits than its factorization.

6406911625 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2323 (or 2313 counting only the distinct ones).

The product of its (nonzero) digits is 77760, while the sum is 40.

The square root of 6406911625 is about 80043.1859998089. The cubic root of 6406911625 is about 1857.3036455251.

The spelling of 6406911625 in words is "six billion, four hundred six million, nine hundred eleven thousand, six hundred twenty-five".