645927454 has 8 divisors (see below), whose sum is σ = 969040800. Its totient is φ = 322913856.

The previous prime is 645927437. The next prime is 645927473. The reversal of 645927454 is 454729546.

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 polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 5814 + ... + 36409.

It is an arithmetic number, because the mean of its divisors is an integer number (121130100).

Almost surely, 2^645927454 is an apocalyptic number.

645927454 is a deficient number, since it is larger than the sum of its proper divisors (323113346).

645927454 is a wasteful number, since it uses less digits than its factorization.

645927454 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 49874.

The product of its digits is 1209600, while the sum is 46.

The square root of 645927454 is about 25415.1028721113. The cubic root of 645927454 is about 864.4261863092.

The spelling of 645927454 in words is "six hundred forty-five million, nine hundred twenty-seven thousand, four hundred fifty-four".