790440640549 has 16 divisors (see below), whose sum is σ = 933465972736. Its totient is φ = 654986833200.

The previous prime is 790440640547. The next prime is 790440640571. The reversal of 790440640549 is 945046044097.

It is not a de Polignac number, because 790440640549 - 2¹ = 790440640547 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 790440640496 and 790440640505.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (790440640547) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1673607 + ... + 2093284.

It is an arithmetic number, because the mean of its divisors is an integer number (58341623296).

Almost surely, 2^790440640549 is an apocalyptic number.

It is an amenable number.

790440640549 is a deficient number, since it is larger than the sum of its proper divisors (143025332187).

790440640549 is a wasteful number, since it uses less digits than its factorization.

790440640549 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3767896.

The product of its (nonzero) digits is 4354560, while the sum is 52.

The spelling of 790440640549 in words is "seven hundred ninety billion, four hundred forty million, six hundred forty thousand, five hundred forty-nine".