27857245464 has 32 divisors (see below), whose sum is σ = 77381238000. Its totient is φ = 9285748416.

The previous prime is 27857245463. The next prime is 27857245543. The reversal of 27857245464 is 46454275872.

27857245464 is a `hidden beast` number, since 2 + 7 + 8 + 572 + 4 + 5 + 4 + 64 = 666.

It is a super-2 number, since 2×27857245464² (a number of 22 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (54).

It is a self number, because there is not a number n which added to its sum of digits gives 27857245464.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (27857245463) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 64484149 + ... + 64484580.

Almost surely, 2^27857245464 is an apocalyptic number.

27857245464 is a gapful number since it is divisible by the number (24) formed by its first and last digit.

It is an amenable number.

27857245464 is an abundant number, since it is smaller than the sum of its proper divisors (49523992536).

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

27857245464 is a wasteful number, since it uses less digits than its factorization.

27857245464 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 128968744 (or 128968734 counting only the distinct ones).

The product of its digits is 15052800, while the sum is 54.

The spelling of 27857245464 in words is "twenty-seven billion, eight hundred fifty-seven million, two hundred forty-five thousand, four hundred sixty-four".