64491753102840 has 192 divisors, whose sum is σ = 239557476787200. Its totient is φ = 14739945705216.

The previous prime is 64491753102709. The next prime is 64491753102877. The reversal of 64491753102840 is 4820135719446.

64491753102840 is a `hidden beast` number, since 6 + 4 + 49 + 1 + 7 + 5 + 310 + 284 + 0 = 666.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 35603319 + ... + 37370841.

It is an arithmetic number, because the mean of its divisors is an integer number (1247695191600).

It is a 1-persistent number, because it is pandigital, but 2⋅64491753102840 = 128983506205680 is not.

Almost surely, 2^{64491753102840} is an apocalyptic number.

64491753102840 is a gapful number since it is divisible by the number (60) formed by its first and last digit.

It is an amenable number.

64491753102840 is an abundant number, since it is smaller than the sum of its proper divisors (175065723684360).

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

64491753102840 is a wasteful number, since it uses less digits than its factorization.

64491753102840 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1782026 (or 1782019 counting only the distinct ones).

The product of its (nonzero) digits is 5806080, while the sum is 54.

The spelling of 64491753102840 in words is "sixty-four trillion, four hundred ninety-one billion, seven hundred fifty-three million, one hundred two thousand, eight hundred forty".