64906190190 has 160 divisors (see below), whose sum is σ = 178525607040. Its totient is φ = 16912820736.

The previous prime is 64906190159. The next prime is 64906190191. The reversal of 64906190190 is 9109160946.

64906190190 is a `hidden beast` number, since 6 + 490 + 61 + 90 + 19 + 0 = 666.

It is a super-2 number, since 2×64906190190² (a number of 22 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (45).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (64906190191) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 79 ways as a sum of consecutive naturals, for example, 36279816 + ... + 36281604.

It is an arithmetic number, because the mean of its divisors is an integer number (1115785044).

Almost surely, 2^64906190190 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 64906190190, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (89262803520).

64906190190 is an abundant number, since it is smaller than the sum of its proper divisors (113619416850).

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

64906190190 is a wasteful number, since it uses less digits than its factorization.

64906190190 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2808 (or 2799 counting only the distinct ones).

The product of its (nonzero) digits is 104976, while the sum is 45.

The spelling of 64906190190 in words is "sixty-four billion, nine hundred six million, one hundred ninety thousand, one hundred ninety".