1641253616 has 20 divisors (see below), whose sum is σ = 3257489424. Its totient is φ = 800611200.

The previous prime is 1641253613. The next prime is 1641253643. The reversal of 1641253616 is 6163521461.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1641253613) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1250300 + ... + 1251611.

Almost surely, 2^1641253616 is an apocalyptic number.

1641253616 is a gapful number since it is divisible by the number (16) formed by its first and last digit.

It is an amenable number.

1641253616 is a deficient number, since it is larger than the sum of its proper divisors (1616235808).

1641253616 is a wasteful number, since it uses less digits than its factorization.

1641253616 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2501960 (or 2501954 counting only the distinct ones).

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

The square root of 1641253616 is about 40512.3884262580. The cubic root of 1641253616 is about 1179.5741104053.

The spelling of 1641253616 in words is "one billion, six hundred forty-one million, two hundred fifty-three thousand, six hundred sixteen".