64849856292 has 72 divisors (see below), whose sum is σ = 180841522680. Its totient is φ = 19467118080.

The previous prime is 64849856263. The next prime is 64849856317. The reversal of 64849856292 is 29265894846.

64849856292 is a `hidden beast` number, since 6 + 4 + 8 + 498 + 56 + 2 + 92 = 666.

It can be written as a sum of positive squares in 4 ways, for example, as 1952225856 + 62897630436 = 44184^2 + 250794^2 .

It is a super-2 number, since 2×64849856292² (a number of 22 digits) contains 22 as substring.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 1670667 + ... + 1709042.

It is an arithmetic number, because the mean of its divisors is an integer number (2511687815).

Almost surely, 2^64849856292 is an apocalyptic number.

It is an amenable number.

64849856292 is an abundant number, since it is smaller than the sum of its proper divisors (115991666388).

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

64849856292 is a wasteful number, since it uses less digits than its factorization.

64849856292 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3379773 (or 3379768 counting only the distinct ones).

The product of its digits is 59719680, while the sum is 63.

The spelling of 64849856292 in words is "sixty-four billion, eight hundred forty-nine million, eight hundred fifty-six thousand, two hundred ninety-two".