642724100403 has 32 divisors (see below), whose sum is σ = 1075229790720. Its totient is φ = 331755989760.

The previous prime is 642724100399. The next prime is 642724100413. The reversal of 642724100403 is 304001427246.

It is not a de Polignac number, because 642724100403 - 2² = 642724100399 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (33).

It is not an unprimeable number, because it can be changed into a prime (642724100413) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 8824738 + ... + 8897271.

It is an arithmetic number, because the mean of its divisors is an integer number (33600930960).

Almost surely, 2^642724100403 is an apocalyptic number.

642724100403 is a deficient number, since it is larger than the sum of its proper divisors (432505690317).

642724100403 is a wasteful number, since it uses less digits than its factorization.

642724100403 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 17722187.

The product of its (nonzero) digits is 32256, while the sum is 33.

Adding to 642724100403 its reverse (304001427246), we get a palindrome (946725527649).

The spelling of 642724100403 in words is "six hundred forty-two billion, seven hundred twenty-four million, one hundred thousand, four hundred three".