2645264333381 has 4 divisors (see below), whose sum is σ = 2784488772000. Its totient is φ = 2506039894764.

The previous prime is 2645264333353. The next prime is 2645264333447. The reversal of 2645264333381 is 1833334625462.

2645264333381 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 2645264333381 - 2²² = 2645260139077 is a prime.

It is a super-2 number, since 2×2645264333381² (a number of 26 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2645264333081) 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, 69612219281 + ... + 69612219318.

It is an arithmetic number, because the mean of its divisors is an integer number (696122193000).

Almost surely, 2^{2645264333381} is an apocalyptic number.

It is an amenable number.

2645264333381 is a deficient number, since it is larger than the sum of its proper divisors (139224438619).

2645264333381 is a wasteful number, since it uses less digits than its factorization.

2645264333381 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 139224438618.

The product of its digits is 7464960, while the sum is 50.

The spelling of 2645264333381 in words is "two trillion, six hundred forty-five billion, two hundred sixty-four million, three hundred thirty-three thousand, three hundred eighty-one".