64540436101260 has 192 divisors, whose sum is σ = 208890826905600. Its totient is φ = 14583490910208.

The previous prime is 64540436101241. The next prime is 64540436101289. The reversal of 64540436101260 is 6210163404546.

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

It is an unprimeable number.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 193798449 + ... + 194131191.

It is an arithmetic number, because the mean of its divisors is an integer number (1087973056800).

Almost surely, 2^{64540436101260} is an apocalyptic number.

64540436101260 is a gapful number since it is divisible by the number (60) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 64540436101260, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (104445413452800).

64540436101260 is an abundant number, since it is smaller than the sum of its proper divisors (144350390804340).

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

64540436101260 is a wasteful number, since it uses less digits than its factorization.

64540436101260 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 338040 (or 338038 counting only the distinct ones).

The product of its (nonzero) digits is 414720, while the sum is 42.

The spelling of 64540436101260 in words is "sixty-four trillion, five hundred forty billion, four hundred thirty-six million, one hundred one thousand, two hundred sixty".