1461665250 has 320 divisors, whose sum is σ = 4484937600. Its totient is φ = 353808000.

The previous prime is 1461665239. The next prime is 1461665251. The reversal of 1461665250 is 525661641.

1461665250 is a `hidden beast` number, since 14 + 61 + 66 + 525 + 0 = 666.

It is a hoax number, since the sum of its digits (36) coincides with the sum of the digits of its distinct prime factors.

It is not an unprimeable number, because it can be changed into a prime (1461665251) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 159 ways as a sum of consecutive naturals, for example, 11157685 + ... + 11157815.

It is an arithmetic number, because the mean of its divisors is an integer number (14015430).

Almost surely, 2^1461665250 is an apocalyptic number.

1461665250 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is a practical number, because each smaller number is the sum of distinct divisors of 1461665250, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2242468800).

1461665250 is an abundant number, since it is smaller than the sum of its proper divisors (3023272350).

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

1461665250 is a wasteful number, since it uses less digits than its factorization.

1461665250 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 208 (or 189 counting only the distinct ones).

The product of its (nonzero) digits is 43200, while the sum is 36.

The square root of 1461665250 is about 38231.7309312566. The cubic root of 1461665250 is about 1134.8783402496.

The spelling of 1461665250 in words is "one billion, four hundred sixty-one million, six hundred sixty-five thousand, two hundred fifty".