645272752774 has 8 divisors (see below), whose sum is σ = 1042363677600. Its totient is φ = 297818193576.

The previous prime is 645272752769. The next prime is 645272752807. The reversal of 645272752774 is 477257272546.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 12409091374 + ... + 12409091425.

It is an arithmetic number, because the mean of its divisors is an integer number (130295459700).

Almost surely, 2^645272752774 is an apocalyptic number.

645272752774 is a deficient number, since it is larger than the sum of its proper divisors (397090924826).

645272752774 is a wasteful number, since it uses less digits than its factorization.

645272752774 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 24818182814.

The product of its digits is 46099200, while the sum is 58.

The spelling of 645272752774 in words is "six hundred forty-five billion, two hundred seventy-two million, seven hundred fifty-two thousand, seven hundred seventy-four".