1491932865 has 16 divisors (see below), whose sum is σ = 2388653568. Its totient is φ = 795177216.

The previous prime is 1491932861. The next prime is 1491932873. The reversal of 1491932865 is 5682391941.

It is not a de Polignac number, because 1491932865 - 2² = 1491932861 is a prime.

It is not an unprimeable number, because it can be changed into a prime (1491932861) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 8232 + ... + 55241.

It is an arithmetic number, because the mean of its divisors is an integer number (149290848).

Almost surely, 2^1491932865 is an apocalyptic number.

1491932865 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

1491932865 is a deficient number, since it is larger than the sum of its proper divisors (896720703).

1491932865 is a wasteful number, since it uses less digits than its factorization.

1491932865 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 65048.

The product of its digits is 466560, while the sum is 48.

The square root of 1491932865 is about 38625.5467922462. The cubic root of 1491932865 is about 1142.6584272767.

The spelling of 1491932865 in words is "one billion, four hundred ninety-one million, nine hundred thirty-two thousand, eight hundred sixty-five".