338778811648 has 36 divisors (see below), whose sum is σ = 676279325988. Its totient is φ = 169378119680.

The previous prime is 338778811619. The next prime is 338778811661. The reversal of 338778811648 is 846118877833.

It can be written as a sum of positive squares in 2 ways, for example, as 146205287424 + 192573524224 = 382368^2 + 438832^2 .

It is a super-2 number, since 2×338778811648² (a number of 24 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (64).

It is a self number, because there is not a number n which added to its sum of digits gives 338778811648.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 4875840 + ... + 4944832.

It is an arithmetic number, because the mean of its divisors is an integer number (18785536833).

Almost surely, 2^338778811648 is an apocalyptic number.

It is an amenable number.

338778811648 is a deficient number, since it is larger than the sum of its proper divisors (337500514340).

338778811648 is an equidigital number, since it uses as much as digits as its factorization.

338778811648 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 88190 (or 88176 counting only the distinct ones).

The product of its digits is 43352064, while the sum is 64.

The spelling of 338778811648 in words is "three hundred thirty-eight billion, seven hundred seventy-eight million, eight hundred eleven thousand, six hundred forty-eight".