1461145646 has 4 divisors (see below), whose sum is σ = 2191718472. Its totient is φ = 730572822.

The previous prime is 1461145639. The next prime is 1461145649. The reversal of 1461145646 is 6465411641.

It is a semiprime because it is the product of two primes.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1461145649) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 365286410 + ... + 365286413.

It is an arithmetic number, because the mean of its divisors is an integer number (547929618).

Almost surely, 2^1461145646 is an apocalyptic number.

1461145646 is a deficient number, since it is larger than the sum of its proper divisors (730572826).

1461145646 is an equidigital number, since it uses as much as digits as its factorization.

1461145646 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 730572825.

The product of its digits is 69120, while the sum is 38.

The square root of 1461145646 is about 38224.9348724102. The cubic root of 1461145646 is about 1134.7438458856.

The spelling of 1461145646 in words is "one billion, four hundred sixty-one million, one hundred forty-five thousand, six hundred forty-six".