1321465616 has 20 divisors (see below), whose sum is σ = 2565569424. Its totient is φ = 659383200.

The previous prime is 1321465609. The next prime is 1321465643. The reversal of 1321465616 is 6165641231.

It is a hoax number, since the sum of its digits (35) coincides with the sum of the digits of its distinct prime factors.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 76250 + ... + 91961.

Almost surely, 2^1321465616 is an apocalyptic number.

1321465616 is a gapful number since it is divisible by the number (16) formed by its first and last digit.

It is an amenable number.

1321465616 is a deficient number, since it is larger than the sum of its proper divisors (1244103808).

1321465616 is a wasteful number, since it uses less digits than its factorization.

1321465616 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 168710 (or 168704 counting only the distinct ones).

The product of its digits is 25920, while the sum is 35.

The square root of 1321465616 is about 36351.9685299160. The cubic root of 1321465616 is about 1097.3671512411.

The spelling of 1321465616 in words is "one billion, three hundred twenty-one million, four hundred sixty-five thousand, six hundred sixteen".