645016401262 has 32 divisors (see below), whose sum is σ = 980868870144. Its totient is φ = 318088404000.

The previous prime is 645016401251. The next prime is 645016401299. The reversal of 645016401262 is 262104610546.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 105720012 + ... + 105726112.

It is an arithmetic number, because the mean of its divisors is an integer number (30652152192).

Almost surely, 2^645016401262 is an apocalyptic number.

645016401262 is a deficient number, since it is larger than the sum of its proper divisors (335852468882).

645016401262 is a wasteful number, since it uses less digits than its factorization.

645016401262 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8304.

The product of its (nonzero) digits is 69120, while the sum is 37.

The spelling of 645016401262 in words is "six hundred forty-five billion, sixteen million, four hundred one thousand, two hundred sixty-two".