1641402647 has 8 divisors (see below), whose sum is σ = 1732926000. Its totient is φ = 1550392704.

The previous prime is 1641402641. The next prime is 1641402713. The reversal of 1641402647 is 7462041461.

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

It is not a de Polignac number, because 1641402647 - 2⁶ = 1641402583 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1641402641) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 121772 + ... + 134577.

It is an arithmetic number, because the mean of its divisors is an integer number (216615750).

Almost surely, 2^1641402647 is an apocalyptic number.

1641402647 is a deficient number, since it is larger than the sum of its proper divisors (91523353).

1641402647 is a wasteful number, since it uses less digits than its factorization.

1641402647 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 256705.

The product of its (nonzero) digits is 32256, while the sum is 35.

The square root of 1641402647 is about 40514.2277107685. The cubic root of 1641402647 is about 1179.6098123401.

The spelling of 1641402647 in words is "one billion, six hundred forty-one million, four hundred two thousand, six hundred forty-seven".