1378751552520 has 64 divisors (see below), whose sum is σ = 4136366520000. Its totient is φ = 367657137408.

The previous prime is 1378751552491. The next prime is 1378751552531. The reversal of 1378751552520 is 252551578731.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 5013966 + ... + 5281794.

It is an arithmetic number, because the mean of its divisors is an integer number (64630726875).

Almost surely, 2^{1378751552520} is an apocalyptic number.

1378751552520 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1378751552520 is an abundant number, since it is smaller than the sum of its proper divisors (2757614967480).

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

1378751552520 is a wasteful number, since it uses less digits than its factorization.

1378751552520 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 310742 (or 310738 counting only the distinct ones).

The product of its (nonzero) digits is 2940000, while the sum is 51.

The spelling of 1378751552520 in words is "one trillion, three hundred seventy-eight billion, seven hundred fifty-one million, five hundred fifty-two thousand, five hundred twenty".