642276354413 has 4 divisors (see below), whose sum is σ = 664423814940. Its totient is φ = 620128893888.

The previous prime is 642276354397. The next prime is 642276354437. The reversal of 642276354413 is 314453672246.

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 384199146244 + 258077208169 = 619838^2 + 508013^2 .

It is a cyclic number.

It is not a de Polignac number, because 642276354413 - 2⁴ = 642276354397 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (642276354913) 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, 11073730220 + ... + 11073730277.

It is an arithmetic number, because the mean of its divisors is an integer number (166105953735).

Almost surely, 2^642276354413 is an apocalyptic number.

It is an amenable number.

642276354413 is a deficient number, since it is larger than the sum of its proper divisors (22147460527).

642276354413 is a wasteful number, since it uses less digits than its factorization.

642276354413 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 22147460526.

The product of its digits is 2903040, while the sum is 47.

The spelling of 642276354413 in words is "six hundred forty-two billion, two hundred seventy-six million, three hundred fifty-four thousand, four hundred thirteen".