64671125850 has 144 divisors (see below), whose sum is σ = 179622503424. Its totient is φ = 16664400000.

The previous prime is 64671125747. The next prime is 64671125903. The reversal of 64671125850 is 5852117646.

64671125850 is a `hidden beast` number, since 6 + 4 + 67 + 1 + 1 + 2 + 585 + 0 = 666.

64671125850 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 (45).

It is a junction number, because it is equal to n+sod(n) for n = 64671125796 and 64671125805.

It is an unprimeable number.

It is a polite number, since it can be written in 71 ways as a sum of consecutive naturals, for example, 10473364 + ... + 10479536.

It is an arithmetic number, because the mean of its divisors is an integer number (1247378496).

Almost surely, 2^64671125850 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 64671125850, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (89811251712).

64671125850 is an abundant number, since it is smaller than the sum of its proper divisors (114951377574).

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

64671125850 is a wasteful number, since it uses less digits than its factorization.

64671125850 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6973 (or 6965 counting only the distinct ones).

The product of its (nonzero) digits is 403200, while the sum is 45.

The spelling of 64671125850 in words is "sixty-four billion, six hundred seventy-one million, one hundred twenty-five thousand, eight hundred fifty".