497578366557 has 48 divisors (see below), whose sum is σ = 774712061760. Its totient is φ = 318864460032.

The previous prime is 497578366531. The next prime is 497578366573. The reversal of 497578366557 is 755663875794.

It is a happy number.

497578366557 is a `hidden beast` number, since 4 + 9 + 7 + 5 + 7 + 8 + 3 + 66 + 557 = 666.

It is not a de Polignac number, because 497578366557 - 2¹⁰ = 497578365533 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (497578366757) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 412869 + ... + 1079637.

It is an arithmetic number, because the mean of its divisors is an integer number (16139834620).

Almost surely, 2^497578366557 is an apocalyptic number.

It is an amenable number.

497578366557 is a deficient number, since it is larger than the sum of its proper divisors (277133695203).

497578366557 is an equidigital number, since it uses as much as digits as its factorization.

497578366557 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 666904 (or 666892 counting only the distinct ones).

The product of its digits is 1333584000, while the sum is 72.

The spelling of 497578366557 in words is "four hundred ninety-seven billion, five hundred seventy-eight million, three hundred sixty-six thousand, five hundred fifty-seven".