6402354642505 has 4 divisors (see below), whose sum is σ = 7682825571012. Its totient is φ = 5121883714000.

The previous prime is 6402354642499. The next prime is 6402354642517. The reversal of 6402354642505 is 5052464532046.

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

It can be written as a sum of positive squares in 2 ways, for example, as 3355022315584 + 3047332326921 = 1831672^2 + 1745661^2 .

It is not a de Polignac number, because 6402354642505 - 2²⁷ = 6402220424777 is a prime.

It is a Duffinian number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 640235464246 + ... + 640235464255.

It is an arithmetic number, because the mean of its divisors is an integer number (1920706392753).

Almost surely, 2^{6402354642505} is an apocalyptic number.

It is an amenable number.

6402354642505 is a deficient number, since it is larger than the sum of its proper divisors (1280470928507).

6402354642505 is a wasteful number, since it uses less digits than its factorization.

6402354642505 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1280470928506.

The product of its (nonzero) digits is 3456000, while the sum is 46.

The spelling of 6402354642505 in words is "six trillion, four hundred two billion, three hundred fifty-four million, six hundred forty-two thousand, five hundred five".