7486728235721 has 4 divisors (see below), whose sum is σ = 8556260840832. Its totient is φ = 6417195630612.

The previous prime is 7486728235717. The next prime is 7486728235759. The reversal of 7486728235721 is 1275328276847.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 7486728235721 - 2² = 7486728235717 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (7486728235321) 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, 534766302545 + ... + 534766302558.

It is an arithmetic number, because the mean of its divisors is an integer number (2139065210208).

Almost surely, 2^{7486728235721} is an apocalyptic number.

It is an amenable number.

7486728235721 is a deficient number, since it is larger than the sum of its proper divisors (1069532605111).

7486728235721 is a wasteful number, since it uses less digits than its factorization.

7486728235721 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1069532605110.

The product of its digits is 63221760, while the sum is 62.

The spelling of 7486728235721 in words is "seven trillion, four hundred eighty-six billion, seven hundred twenty-eight million, two hundred thirty-five thousand, seven hundred twenty-one".