1642353423506 has 8 divisors (see below), whose sum is σ = 2466509013360. Its totient is φ = 820183752388.

The previous prime is 1642353423457. The next prime is 1642353423523. The reversal of 1642353423506 is 6053243532461.

It is a happy number.

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

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, 496477616 + ... + 496480923.

It is an arithmetic number, because the mean of its divisors is an integer number (308313626670).

Almost surely, 2^{1642353423506} is an apocalyptic number.

1642353423506 is a deficient number, since it is larger than the sum of its proper divisors (824155589854).

1642353423506 is an equidigital number, since it uses as much as digits as its factorization.

1642353423506 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 992959368.

The product of its (nonzero) digits is 1555200, while the sum is 44.

Adding to 1642353423506 its reverse (6053243532461), we get a palindrome (7695596955967).

The spelling of 1642353423506 in words is "one trillion, six hundred forty-two billion, three hundred fifty-three million, four hundred twenty-three thousand, five hundred six".