1378621537392 has 640 divisors, whose sum is σ = 4162732425216. Its totient is φ = 389491200000.

The previous prime is 1378621537379. The next prime is 1378621537411. The reversal of 1378621537392 is 2937351268731.

It is a super-2 number, since 2×1378621537392² (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 127 ways as a sum of consecutive naturals, for example, 10855287633 + ... + 10855287759.

Almost surely, 2^{1378621537392} is an apocalyptic number.

1378621537392 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 1378621537392, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2081366212608).

1378621537392 is an abundant number, since it is smaller than the sum of its proper divisors (2784110887824).

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

1378621537392 is a wasteful number, since it uses less digits than its factorization.

1378621537392 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 429 (or 423 counting only the distinct ones).

The product of its digits is 11430720, while the sum is 57.

The spelling of 1378621537392 in words is "one trillion, three hundred seventy-eight billion, six hundred twenty-one million, five hundred thirty-seven thousand, three hundred ninety-two".