2664323256442 has 4 divisors (see below), whose sum is σ = 3996484884666. Its totient is φ = 1332161628220.

The previous prime is 2664323256437. The next prime is 2664323256443. The reversal of 2664323256442 is 2446523234662.

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

It can be written as a sum of positive squares in only one way, i.e., 2350576519281 + 313746737161 = 1533159^2 + 560131^2 .

It is not an unprimeable number, because it can be changed into a prime (2664323256443) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 666080814109 + ... + 666080814112.

Almost surely, 2^{2664323256442} is an apocalyptic number.

2664323256442 is a deficient number, since it is larger than the sum of its proper divisors (1332161628224).

2664323256442 is a wasteful number, since it uses less digits than its factorization.

2664323256442 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1332161628223.

The product of its digits is 9953280, while the sum is 49.

The spelling of 2664323256442 in words is "two trillion, six hundred sixty-four billion, three hundred twenty-three million, two hundred fifty-six thousand, four hundred forty-two".