64075747890 has 256 divisors, whose sum is σ = 197370224640. Its totient is φ = 12924334080.

The previous prime is 64075747867. The next prime is 64075747891. The reversal of 64075747890 is 9874757046.

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 64075747890.

It is not an unprimeable number, because it can be changed into a prime (64075747891) 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 127 ways as a sum of consecutive naturals, for example, 63503706 + ... + 63504714.

It is an arithmetic number, because the mean of its divisors is an integer number (770977440).

Almost surely, 2^64075747890 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 64075747890, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (98685112320).

64075747890 is an abundant number, since it is smaller than the sum of its proper divisors (133294476750).

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

64075747890 is a wasteful number, since it uses less digits than its factorization.

64075747890 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1817.

The product of its (nonzero) digits is 11854080, while the sum is 57.

The spelling of 64075747890 in words is "sixty-four billion, seventy-five million, seven hundred forty-seven thousand, eight hundred ninety".