1641987395 has 8 divisors (see below), whose sum is σ = 2038329360. Its totient is φ = 1268293600.

The previous prime is 1641987383. The next prime is 1641987427. The reversal of 1641987395 is 5937891461.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 1641987395 - 2⁶ = 1641987331 is a prime.

It is a super-2 number, since 2×1641987395² = 5392245210677772050, which contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 5661881 + ... + 5662170.

It is an arithmetic number, because the mean of its divisors is an integer number (254791170).

Almost surely, 2^1641987395 is an apocalyptic number.

1641987395 is a deficient number, since it is larger than the sum of its proper divisors (396341965).

1641987395 is a wasteful number, since it uses less digits than its factorization.

1641987395 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11324085.

The product of its digits is 1632960, while the sum is 53.

The square root of 1641987395 is about 40521.4436440757. The cubic root of 1641987395 is about 1179.7498739688.

The spelling of 1641987395 in words is "one billion, six hundred forty-one million, nine hundred eighty-seven thousand, three hundred ninety-five".