845640728335 has 32 divisors (see below), whose sum is σ = 1197012479040. Its totient is φ = 567472539648.

The previous prime is 845640728329. The next prime is 845640728371. The reversal of 845640728335 is 533827046548.

It is a cyclic number.

It is not a de Polignac number, because 845640728335 - 2³ = 845640728327 is a prime.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 13162537 + ... + 13226626.

It is an arithmetic number, because the mean of its divisors is an integer number (37406639970).

Almost surely, 2^845640728335 is an apocalyptic number.

845640728335 is a gapful number since it is divisible by the number (85) formed by its first and last digit.

845640728335 is a deficient number, since it is larger than the sum of its proper divisors (351371750705).

845640728335 is a wasteful number, since it uses less digits than its factorization.

845640728335 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 26389227.

The product of its (nonzero) digits is 19353600, while the sum is 55.

The spelling of 845640728335 in words is "eight hundred forty-five billion, six hundred forty million, seven hundred twenty-eight thousand, three hundred thirty-five".