494699815801 has 3 divisors (see below), whose sum is σ = 494700519151. Its totient is φ = 494699112452.

The previous prime is 494699815783. The next prime is 494699815807. The reversal of 494699815801 is 108518996494.

The square root of 494699815801 is 703349.

It is a perfect power (a square), and thus also a powerful number.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length.

It can be written as a sum of positive squares in only one way, i.e., 403096740201 + 91603075600 = 634899^2 + 302660^2 .

It is not a de Polignac number, because 494699815801 - 2¹¹ = 494699813753 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (494699815807) by changing a digit.

It is a polite number, since it can be written in 2 ways as a sum of consecutive naturals, for example, 351675 + ... + 1055023.

Almost surely, 2^494699815801 is an apocalyptic number.

494699815801 is the 703349-th square number.

494699815801 is the 351675-th centered octagonal number.

It is an amenable number.

494699815801 is a deficient number, since it is larger than the sum of its proper divisors (703350).

494699815801 is an frugal number, since it uses more digits than its factorization.

494699815801 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1406698 (or 703349 counting only the distinct ones).

The product of its (nonzero) digits is 22394880, while the sum is 64.

Multiplying 494699815801 by its sum of digits (64), we get a square (31660788211264 = 5626792²).

The spelling of 494699815801 in words is "four hundred ninety-four billion, six hundred ninety-nine million, eight hundred fifteen thousand, eight hundred one".