2645445451 has 4 divisors (see below), whose sum is σ = 2885940504. Its totient is φ = 2404950400.

The previous prime is 2645445437. The next prime is 2645445457. The reversal of 2645445451 is 1545445462.

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

It is a cyclic number.

It is not a de Polignac number, because 2645445451 - 2⁹ = 2645444939 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (2645445457) 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, 120247510 + ... + 120247531.

It is an arithmetic number, because the mean of its divisors is an integer number (721485126).

Almost surely, 2^2645445451 is an apocalyptic number.

2645445451 is a deficient number, since it is larger than the sum of its proper divisors (240495053).

2645445451 is a wasteful number, since it uses less digits than its factorization.

2645445451 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 240495052.

The product of its digits is 384000, while the sum is 40.

The square root of 2645445451 is about 51433.8939902473. The cubic root of 2645445451 is about 1383.0342552869.

The spelling of 2645445451 in words is "two billion, six hundred forty-five million, four hundred forty-five thousand, four hundred fifty-one".