7643497450 has 12 divisors (see below), whose sum is σ = 14216905350. Its totient is φ = 3057398960.

The previous prime is 7643497397. The next prime is 7643497451. The reversal of 7643497450 is 547943467.

It can be written as a sum of positive squares in 3 ways, for example, as 7274895849 + 368601601 = 85293^2 + 19199^2 .

It is a junction number, because it is equal to n+sod(n) for n = 7643497394 and 7643497403.

It is not an unprimeable number, because it can be changed into a prime (7643497451) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 76434925 + ... + 76435024.

Almost surely, 2^7643497450 is an apocalyptic number.

7643497450 is a deficient number, since it is larger than the sum of its proper divisors (6573407900).

7643497450 is a wasteful number, since it uses less digits than its factorization.

7643497450 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 152869961 (or 152869956 counting only the distinct ones).

The product of its (nonzero) digits is 2540160, while the sum is 49.

The square root of 7643497450 is about 87427.0979159208. The cubic root of 7643497450 is about 1969.8388944669.

The spelling of 7643497450 in words is "seven billion, six hundred forty-three million, four hundred ninety-seven thousand, four hundred fifty".