6457989778460 has 96 divisors (see below), whose sum is σ = 14841977492160. Its totient is φ = 2340858009600.

The previous prime is 6457989778453. The next prime is 6457989778547. The reversal of 6457989778460 is 648779897546.

It is a happy number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 141783290 + ... + 141828830.

It is an arithmetic number, because the mean of its divisors is an integer number (154603932210).

Almost surely, 2^{6457989778460} 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 6457989778460, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (7420988746080).

6457989778460 is an abundant number, since it is smaller than the sum of its proper divisors (8383987713700).

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

6457989778460 is a wasteful number, since it uses less digits than its factorization.

6457989778460 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 47607 (or 47605 counting only the distinct ones).

The product of its (nonzero) digits is 5120962560, while the sum is 80.

The spelling of 6457989778460 in words is "six trillion, four hundred fifty-seven billion, nine hundred eighty-nine million, seven hundred seventy-eight thousand, four hundred sixty".