42720403503 has 4 divisors (see below), whose sum is σ = 56960538008. Its totient is φ = 28480269000.

The previous prime is 42720403489. The next prime is 42720403519. The reversal of 42720403503 is 30530402724.

42720403503 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes.

It is not a de Polignac number, because 42720403503 - 2⁸ = 42720403247 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (42720403553) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 7120067248 + ... + 7120067253.

It is an arithmetic number, because the mean of its divisors is an integer number (14240134502).

Almost surely, 2^42720403503 is an apocalyptic number.

42720403503 is a deficient number, since it is larger than the sum of its proper divisors (14240134505).

42720403503 is a wasteful number, since it uses less digits than its factorization.

42720403503 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 14240134504.

The product of its (nonzero) digits is 20160, while the sum is 30.

The spelling of 42720403503 in words is "forty-two billion, seven hundred twenty million, four hundred three thousand, five hundred three".