64191960 has 192 divisors, whose sum is σ = 249112800. Its totient is φ = 14660352.

The previous prime is 64191943. The next prime is 64191971. The reversal of 64191960 is 6919146.

64191960 is a `hidden beast` number, since 641 + 9 + 1 + 9 + 6 + 0 = 666.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 52314 + ... + 53526.

Almost surely, 2^64191960 is an apocalyptic number.

64191960 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 64191960, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (124556400).

64191960 is an abundant number, since it is smaller than the sum of its proper divisors (184920840).

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

64191960 is a wasteful number, since it uses less digits than its factorization.

64191960 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1247 (or 1230 counting only the distinct ones).

The product of its (nonzero) digits is 11664, while the sum is 36.

The square root of 64191960 is about 8011.9885172159. The cubic root of 64191960 is about 400.3995174982.

The spelling of 64191960 in words is "sixty-four million, one hundred ninety-one thousand, nine hundred sixty".