10428721507 has 4 divisors (see below), whose sum is σ = 10560730720. Its totient is φ = 10296712296.

The previous prime is 10428721489. The next prime is 10428721517. The reversal of 10428721507 is 70512782401.

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

It is a cyclic number.

It is not a de Polignac number, because 10428721507 - 2¹¹ = 10428719459 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (10428721517) 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, 66004488 + ... + 66004645.

It is an arithmetic number, because the mean of its divisors is an integer number (2640182680).

Almost surely, 2^10428721507 is an apocalyptic number.

10428721507 is a deficient number, since it is larger than the sum of its proper divisors (132009213).

10428721507 is an equidigital number, since it uses as much as digits as its factorization.

10428721507 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 132009212.

The product of its (nonzero) digits is 31360, while the sum is 37.

The spelling of 10428721507 in words is "ten billion, four hundred twenty-eight million, seven hundred twenty-one thousand, five hundred seven".