6457275440 has 160 divisors (see below), whose sum is σ = 18832794624. Its totient is φ = 2000286720.

The previous prime is 6457275437. The next prime is 6457275469. The reversal of 6457275440 is 445727546.

It is a happy number.

It is a super-2 number, since 2×6457275440² = 83392812216054387200, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (44).

It is a junction number, because it is equal to n+sod(n) for n = 6457275391 and 6457275400.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 1025582 + ... + 1031858.

Almost surely, 2^6457275440 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 6457275440, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (9416397312).

6457275440 is an abundant number, since it is smaller than the sum of its proper divisors (12375519184).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

6457275440 is a wasteful number, since it uses less digits than its factorization.

6457275440 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6475 (or 6469 counting only the distinct ones).

The product of its (nonzero) digits is 940800, while the sum is 44.

The square root of 6457275440 is about 80357.1741663431. The cubic root of 6457275440 is about 1862.1576148852.

The spelling of 6457275440 in words is "six billion, four hundred fifty-seven million, two hundred seventy-five thousand, four hundred forty".