646265379375 has 480 divisors, whose sum is σ = 1525971532800. Its totient is φ = 261001440000.

The previous prime is 646265379343. The next prime is 646265379439. The reversal of 646265379375 is 573973562646.

646265379375 is a `hidden beast` number, since 6 + 4 + 6 + 2 + 6 + 537 + 93 + 7 + 5 = 666.

It is not a de Polignac number, because 646265379375 - 2⁵ = 646265379343 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (63).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 479 ways as a sum of consecutive naturals, for example, 785255214 + ... + 785256036.

It is an arithmetic number, because the mean of its divisors is an integer number (3179107360).

Almost surely, 2^646265379375 is an apocalyptic number.

646265379375 is an abundant number, since it is smaller than the sum of its proper divisors (879706153425).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

646265379375 is a wasteful number, since it uses less digits than its factorization.

646265379375 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 918 (or 886 counting only the distinct ones).

The product of its digits is 171460800, while the sum is 63.

The spelling of 646265379375 in words is "six hundred forty-six billion, two hundred sixty-five million, three hundred seventy-nine thousand, three hundred seventy-five".