645621260335 has 8 divisors (see below), whose sum is σ = 775164985056. Its totient is φ = 516217359840.

The previous prime is 645621260321. The next prime is 645621260377. The reversal of 645621260335 is 533062126546.

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

It is not a de Polignac number, because 645621260335 - 2⁹ = 645621259823 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 645621260291 and 645621260300.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 34945896 + ... + 34964365.

It is an arithmetic number, because the mean of its divisors is an integer number (96895623132).

Almost surely, 2^645621260335 is an apocalyptic number.

645621260335 is a deficient number, since it is larger than the sum of its proper divisors (129543724721).

645621260335 is a wasteful number, since it uses less digits than its factorization.

645621260335 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 69912113.

The product of its (nonzero) digits is 777600, while the sum is 43.

The spelling of 645621260335 in words is "six hundred forty-five billion, six hundred twenty-one million, two hundred sixty thousand, three hundred thirty-five".