1378816507012 has 36 divisors (see below), whose sum is σ = 2807091321804. Its totient is φ = 590876126400.

The previous prime is 1378816506989. The next prime is 1378816507021. The reversal of 1378816507012 is 2107056188731.

It can be written as a sum of positive squares in 2 ways, for example, as 161488244736 + 1217328262276 = 401856^2 + 1103326^2 .

It is a super-2 number, since 2×1378816507012² (a number of 25 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (49).

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 2363262 + ... + 2888362.

It is an arithmetic number, because the mean of its divisors is an integer number (77974758939).

Almost surely, 2^{1378816507012} is an apocalyptic number.

It is an amenable number.

1378816507012 is an abundant number, since it is smaller than the sum of its proper divisors (1428274814792).

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

1378816507012 is a wasteful number, since it uses less digits than its factorization.

1378816507012 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 538516 (or 538507 counting only the distinct ones).

The product of its (nonzero) digits is 564480, while the sum is 49.

The spelling of 1378816507012 in words is "one trillion, three hundred seventy-eight billion, eight hundred sixteen million, five hundred seven thousand, twelve".