64774157760 has 1176 divisors, whose sum is σ = 263372217984. Its totient is φ = 15138938880.

The previous prime is 64774157753. The next prime is 64774157801. The reversal of 64774157760 is 6775147746.

It is a happy number.

64774157760 is a `hidden beast` number, since 6 + 4 + 7 + 7 + 4 + 1 + 577 + 60 = 666.

64774157760 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a Harshad number since it is a multiple of its sum of digits (54).

It is a junction number, because it is equal to n+sod(n) for n = 64774157697 and 64774157706.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 167 ways as a sum of consecutive naturals, for example, 1222153894 + ... + 1222153946.

Almost surely, 2^64774157760 is an apocalyptic number.

64774157760 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 64774157760, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (131686108992).

64774157760 is an abundant number, since it is smaller than the sum of its proper divisors (198598060224).

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

64774157760 is a wasteful number, since it uses less digits than its factorization.

64774157760 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 145 (or 107 counting only the distinct ones).

The product of its (nonzero) digits is 6914880, while the sum is 54.

The spelling of 64774157760 in words is "sixty-four billion, seven hundred seventy-four million, one hundred fifty-seven thousand, seven hundred sixty".