1378818636926 has 16 divisors (see below), whose sum is σ = 2135044448640. Its totient is φ = 667139226240.

The previous prime is 1378818636911. The next prime is 1378818636941. The reversal of 1378818636926 is 6296368188731.

It is an interprime number because it is at equal distance from previous prime (1378818636911) and next prime (1378818636941).

It is a super-2 number, since 2×1378818636926² (a number of 25 digits) contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 852530 + ... + 1866666.

It is an arithmetic number, because the mean of its divisors is an integer number (133440278040).

Almost surely, 2^{1378818636926} is an apocalyptic number.

1378818636926 is a deficient number, since it is larger than the sum of its proper divisors (756225811714).

1378818636926 is a wasteful number, since it uses less digits than its factorization.

1378818636926 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1036099.

The product of its digits is 125411328, while the sum is 68.

The spelling of 1378818636926 in words is "one trillion, three hundred seventy-eight billion, eight hundred eighteen million, six hundred thirty-six thousand, nine hundred twenty-six".