799640990354 has 16 divisors (see below), whose sum is σ = 1201694772600. Its totient is φ = 399076245504.

The previous prime is 799640990353. The next prime is 799640990359. The reversal of 799640990354 is 453099046997.

It can be written as a sum of positive squares in 4 ways, for example, as 783619759729 + 16021230625 = 885223^2 + 126575^2 .

It is not an unprimeable number, because it can be changed into a prime (799640990353) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 9894542 + ... + 9975030.

Almost surely, 2^799640990354 is an apocalyptic number.

799640990354 is a deficient number, since it is larger than the sum of its proper divisors (402053782246).

799640990354 is a wasteful number, since it uses less digits than its factorization.

799640990354 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 89677.

The product of its (nonzero) digits is 66134880, while the sum is 65.

The spelling of 799640990354 in words is "seven hundred ninety-nine billion, six hundred forty million, nine hundred ninety thousand, three hundred fifty-four".