6457699450 has 12 divisors (see below), whose sum is σ = 12011321070. Its totient is φ = 2583079760.

The previous prime is 6457699427. The next prime is 6457699483. The reversal of 6457699450 is 549967546.

It is a happy number.

It can be written as a sum of positive squares in 3 ways, for example, as 5784971481 + 672727969 = 76059^2 + 25937^2 .

It is a junction number, because it is equal to n+sod(n) for n = 6457699391 and 6457699400.

It is an unprimeable number.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 64576945 + ... + 64577044.

Almost surely, 2^6457699450 is an apocalyptic number.

6457699450 is a deficient number, since it is larger than the sum of its proper divisors (5553621620).

6457699450 is a wasteful number, since it uses less digits than its factorization.

6457699450 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 129154001 (or 129153996 counting only the distinct ones).

The product of its (nonzero) digits is 8164800, while the sum is 55.

The square root of 6457699450 is about 80359.8124064510. The cubic root of 6457699450 is about 1862.1983728476.

The spelling of 6457699450 in words is "six billion, four hundred fifty-seven million, six hundred ninety-nine thousand, four hundred fifty".