6457661245 has 48 divisors (see below), whose sum is σ = 9433380528. Its totient is φ = 4226826240.

The previous prime is 6457661227. The next prime is 6457661261. The reversal of 6457661245 is 5421667546.

It can be written as a sum of positive squares in 8 ways, for example, as 30272004 + 6427389241 = 5502^2 + 80171^2 .

It is not a de Polignac number, because 6457661245 - 2¹⁹ = 6457136957 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 6457661195 and 6457661204.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 473725 + ... + 487165.

It is an arithmetic number, because the mean of its divisors is an integer number (196528761).

Almost surely, 2^6457661245 is an apocalyptic number.

It is an amenable number.

6457661245 is a deficient number, since it is larger than the sum of its proper divisors (2975719283).

6457661245 is a wasteful number, since it uses less digits than its factorization.

6457661245 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 13550 (or 13543 counting only the distinct ones).

The product of its digits is 1209600, while the sum is 46.

The square root of 6457661245 is about 80359.5746939965. The cubic root of 6457661245 is about 1862.1947004650.

The spelling of 6457661245 in words is "six billion, four hundred fifty-seven million, six hundred sixty-one thousand, two hundred forty-five".