1642537403 has 32 divisors (see below), whose sum is σ = 1905120000. Its totient is φ = 1403436672.

The previous prime is 1642537373. The next prime is 1642537417. The reversal of 1642537403 is 3047352461.

It is a de Polignac number, because none of the positive numbers 2^k-1642537403 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1642537903) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 3919928 + ... + 3920346.

It is an arithmetic number, because the mean of its divisors is an integer number (59535000).

Almost surely, 2^1642537403 is an apocalyptic number.

1642537403 is a gapful number since it is divisible by the number (13) formed by its first and last digit.

1642537403 is a deficient number, since it is larger than the sum of its proper divisors (262582597).

1642537403 is a wasteful number, since it uses less digits than its factorization.

1642537403 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 779.

The product of its (nonzero) digits is 60480, while the sum is 35.

The square root of 1642537403 is about 40528.2297047379. The cubic root of 1642537403 is about 1179.8815841623.

Adding to 1642537403 its reverse (3047352461), we get a palindrome (4689889864).

The spelling of 1642537403 in words is "one billion, six hundred forty-two million, five hundred thirty-seven thousand, four hundred three".