497509390781401 has 4 divisors (see below), whose sum is σ = 497509636703652. Its totient is φ = 497509144859152.

The previous prime is 497509390781363. The next prime is 497509390781503. The reversal of 497509390781401 is 104187093905794.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 371918167632400 + 125591223149001 = 19285180^2 + 11206749^2 .

It is a cyclic number.

It is not a de Polignac number, because 497509390781401 - 2⁹ = 497509390780889 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (497509390781101) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 119901190 + ... + 123981103.

It is an arithmetic number, because the mean of its divisors is an integer number (124377409175913).

Almost surely, 2^{497509390781401} is an apocalyptic number.

It is an amenable number.

497509390781401 is a deficient number, since it is larger than the sum of its proper divisors (245922251).

497509390781401 is a wasteful number, since it uses less digits than its factorization.

497509390781401 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 245922250.

The product of its (nonzero) digits is 68584320, while the sum is 67.

The spelling of 497509390781401 in words is "four hundred ninety-seven trillion, five hundred nine billion, three hundred ninety million, seven hundred eighty-one thousand, four hundred one".