6406515355 has 4 divisors (see below), whose sum is σ = 7687818432. Its totient is φ = 5125212280.

The previous prime is 6406515341. The next prime is 6406515359. The reversal of 6406515355 is 5535156046.

It is a semiprime because it is the product of two primes.

It is not a de Polignac number, because 6406515355 - 2⁹ = 6406514843 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (6406515359) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 640651531 + ... + 640651540.

It is an arithmetic number, because the mean of its divisors is an integer number (1921954608).

Almost surely, 2^6406515355 is an apocalyptic number.

6406515355 is a deficient number, since it is larger than the sum of its proper divisors (1281303077).

6406515355 is a wasteful number, since it uses less digits than its factorization.

6406515355 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1281303076.

The product of its (nonzero) digits is 270000, while the sum is 40.

The square root of 6406515355 is about 80040.7106102888. The cubic root of 6406515355 is about 1857.2653530824.

The spelling of 6406515355 in words is "six billion, four hundred six million, five hundred fifteen thousand, three hundred fifty-five".