497523481978 has 16 divisors (see below), whose sum is σ = 766505178504. Its totient is φ = 242022634560.

The previous prime is 497523481967. The next prime is 497523482003. The reversal of 497523481978 is 879184325794.

It can be written as a sum of positive squares in 4 ways, for example, as 355052714769 + 142470767209 = 595863^2 + 377453^2 .

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 963168 + ... + 1386628.

Almost surely, 2^497523481978 is an apocalyptic number.

497523481978 is a deficient number, since it is larger than the sum of its proper divisors (268981696526).

497523481978 is a wasteful number, since it uses less digits than its factorization.

497523481978 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 439377.

The product of its digits is 121927680, while the sum is 67.

The spelling of 497523481978 in words is "four hundred ninety-seven billion, five hundred twenty-three million, four hundred eighty-one thousand, nine hundred seventy-eight".