64953961770 has 64 divisors (see below), whose sum is σ = 159854881536. Its totient is φ = 16881323520.

The previous prime is 64953961753. The next prime is 64953961783. The reversal of 64953961770 is 7716935946.

It is a happy number.

It is a self number, because there is not a number n which added to its sum of digits gives 64953961770.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 1199827 + ... + 1252793.

It is an arithmetic number, because the mean of its divisors is an integer number (2497732524).

Almost surely, 2^64953961770 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 64953961770, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (79927440768).

64953961770 is an abundant number, since it is smaller than the sum of its proper divisors (94900919766).

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

64953961770 is a wasteful number, since it uses less digits than its factorization.

64953961770 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 54015.

The product of its (nonzero) digits is 8573040, while the sum is 57.

The spelling of 64953961770 in words is "sixty-four billion, nine hundred fifty-three million, nine hundred sixty-one thousand, seven hundred seventy".