783938878464 has 352 divisors, whose sum is σ = 2437820969472. Its totient is φ = 219340800000.

The previous prime is 783938878439. The next prime is 783938878469. The reversal of 783938878464 is 464878839387.

It is a super-2 number, since 2×783938878464² (a number of 25 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (783938878469) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 329246554 + ... + 329248934.

Almost surely, 2^783938878464 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 783938878464, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1218910484736).

783938878464 is an abundant number, since it is smaller than the sum of its proper divisors (1653882091008).

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

783938878464 is a wasteful number, since it uses less digits than its factorization.

783938878464 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2723 (or 2705 counting only the distinct ones).

The product of its digits is 1560674304, while the sum is 75.

The spelling of 783938878464 in words is "seven hundred eighty-three billion, nine hundred thirty-eight million, eight hundred seventy-eight thousand, four hundred sixty-four".