7629785643 has 4 divisors (see below), whose sum is σ = 10173047528. Its totient is φ = 5086523760.

The previous prime is 7629785641. The next prime is 7629785693. The reversal of 7629785643 is 3465879267.

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

It is not a de Polignac number, because 7629785643 - 2¹ = 7629785641 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (7629785641) 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, 1271630938 + ... + 1271630943.

It is an arithmetic number, because the mean of its divisors is an integer number (2543261882).

Almost surely, 2^7629785643 is an apocalyptic number.

7629785643 is a deficient number, since it is larger than the sum of its proper divisors (2543261885).

7629785643 is a wasteful number, since it uses less digits than its factorization.

7629785643 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2543261884.

The product of its digits is 15240960, while the sum is 57.

The square root of 7629785643 is about 87348.6441966903. The cubic root of 7629785643 is about 1968.6602796463.

The spelling of 7629785643 in words is "seven billion, six hundred twenty-nine million, seven hundred eighty-five thousand, six hundred forty-three".