64827140280 has 64 divisors (see below), whose sum is σ = 222264483840. Its totient is φ = 14817631872.

The previous prime is 64827140267. The next prime is 64827140303. The reversal of 64827140280 is 8204172846.

It is a Harshad number since it is a multiple of its sum of digits (42).

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, 38586744 + ... + 38588423.

It is an arithmetic number, because the mean of its divisors is an integer number (3472882560).

Almost surely, 2^64827140280 is an apocalyptic number.

64827140280 is a gapful number since it is divisible by the number (60) formed by its first and last digit.

It is an amenable number.

64827140280 is an abundant number, since it is smaller than the sum of its proper divisors (157437343560).

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

64827140280 is a wasteful number, since it uses less digits than its factorization.

64827140280 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 77175188 (or 77175184 counting only the distinct ones).

The product of its (nonzero) digits is 172032, while the sum is 42.

It can be divided in two parts, 648271 and 40280, that added together give a triangular number (688551 = T₁₁₇₃).

The spelling of 64827140280 in words is "sixty-four billion, eight hundred twenty-seven million, one hundred forty thousand, two hundred eighty".