1642213647 has 12 divisors (see below), whose sum is σ = 2384379504. Its totient is φ = 1089135360.

The previous prime is 1642213627. The next prime is 1642213649. The reversal of 1642213647 is 7463122461.

1642213647 is a `hidden beast` number, since 1 + 6 + 4 + 2 + 2 + 1 + 3 + 647 = 666.

It is not a de Polignac number, because 1642213647 - 2¹² = 1642209551 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1642213649) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 470979 + ... + 474452.

It is an arithmetic number, because the mean of its divisors is an integer number (198698292).

Almost surely, 2^1642213647 is an apocalyptic number.

1642213647 is a deficient number, since it is larger than the sum of its proper divisors (742165857).

1642213647 is a wasteful number, since it uses less digits than its factorization.

1642213647 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 945630 (or 945627 counting only the distinct ones).

The product of its digits is 48384, while the sum is 36.

The square root of 1642213647 is about 40524.2353043213. The cubic root of 1642213647 is about 1179.8040580043.

The spelling of 1642213647 in words is "one billion, six hundred forty-two million, two hundred thirteen thousand, six hundred forty-seven".