642047018503 has 8 divisors (see below), whose sum is σ = 730867752576. Its totient is φ = 558301755000.

The previous prime is 642047018491. The next prime is 642047018533. The reversal of 642047018503 is 305810740246.

642047018503 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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

It is a de Polignac number, because none of the positive numbers 2^k-642047018503 is a prime.

It is a super-2 number, since 2×642047018503² (a number of 24 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (642047018533) 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, 1268867373 + ... + 1268867878.

It is an arithmetic number, because the mean of its divisors is an integer number (91358469072).

Almost surely, 2^642047018503 is an apocalyptic number.

642047018503 is a deficient number, since it is larger than the sum of its proper divisors (88820734073).

642047018503 is a wasteful number, since it uses less digits than its factorization.

642047018503 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2537735285.

The product of its (nonzero) digits is 161280, while the sum is 40.

Adding to 642047018503 its reverse (305810740246), we get a palindrome (947857758749).

The spelling of 642047018503 in words is "six hundred forty-two billion, forty-seven million, eighteen thousand, five hundred three".