645826954 has 8 divisors (see below), whose sum is σ = 971856288. Its totient is φ = 321874860.

The previous prime is 645826939. The next prime is 645826969. The reversal of 645826954 is 459628546.

645826954 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is an interprime number because it is at equal distance from previous prime (645826939) and next prime (645826969).

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

It is a junction number, because it is equal to n+sod(n) for n = 645826898 and 645826907.

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, 518532 + ... + 519775.

It is an arithmetic number, because the mean of its divisors is an integer number (121482036).

Almost surely, 2^645826954 is an apocalyptic number.

645826954 is a deficient number, since it is larger than the sum of its proper divisors (326029334).

645826954 is a wasteful number, since it uses less digits than its factorization.

645826954 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1038620.

The product of its digits is 2073600, while the sum is 49.

The square root of 645826954 is about 25413.1256243698. The cubic root of 645826954 is about 864.3813518947.

The spelling of 645826954 in words is "six hundred forty-five million, eight hundred twenty-six thousand, nine hundred fifty-four".