779544065490 has 128 divisors (see below), whose sum is σ = 1929198345984. Its totient is φ = 201590899200.

The previous prime is 779544065473. The next prime is 779544065507. The reversal of 779544065490 is 94560445977.

It is an interprime number because it is at equal distance from previous prime (779544065473) and next prime (779544065507).

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 374239989 + ... + 374242071.

It is an arithmetic number, because the mean of its divisors is an integer number (15071862078).

Almost surely, 2^779544065490 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 779544065490, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (964599172992).

779544065490 is an abundant number, since it is smaller than the sum of its proper divisors (1149654280494).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

779544065490 is a wasteful number, since it uses less digits than its factorization.

779544065490 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2397 (or 2315 counting only the distinct ones).

The product of its (nonzero) digits is 38102400, while the sum is 60.

The spelling of 779544065490 in words is "seven hundred seventy-nine billion, five hundred forty-four million, sixty-five thousand, four hundred ninety".