7643709512 has 8 divisors (see below), whose sum is σ = 14331955350. Its totient is φ = 3821854752.

The previous prime is 7643709509. The next prime is 7643709523. The reversal of 7643709512 is 2159073467.

It can be written as a sum of positive squares in only one way, i.e., 6053773636 + 1589935876 = 77806^2 + 39874^2 .

It is a tau number, because it is divible by the number of its divisors (8).

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 477731837 + ... + 477731852.

Almost surely, 2^7643709512 is an apocalyptic number.

It is an amenable number.

7643709512 is a deficient number, since it is larger than the sum of its proper divisors (6688245838).

7643709512 is a wasteful number, since it uses less digits than its factorization.

7643709512 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 955463695 (or 955463691 counting only the distinct ones).

The product of its (nonzero) digits is 317520, while the sum is 44.

The square root of 7643709512 is about 87428.3107008251. The cubic root of 7643709512 is about 1969.8571114379.

The spelling of 7643709512 in words is "seven billion, six hundred forty-three million, seven hundred nine thousand, five hundred twelve".