1393806987056 has 20 divisors (see below), whose sum is σ = 2946001132104. Its totient is φ = 633548630400.

The previous prime is 1393806987017. The next prime is 1393806987073. The reversal of 1393806987056 is 6507896083931.

It is a super-2 number, since 2×1393806987056² (a number of 25 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 1393806986983 and 1393806987001.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3959678765 + ... + 3959679116.

Almost surely, 2^{1393806987056} is an apocalyptic number.

1393806987056 is a gapful number since it is divisible by the number (16) formed by its first and last digit.

It is an amenable number.

1393806987056 is an abundant number, since it is smaller than the sum of its proper divisors (1552194145048).

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

1393806987056 is a wasteful number, since it uses less digits than its factorization.

1393806987056 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7919357900 (or 7919357894 counting only the distinct ones).

The product of its (nonzero) digits is 58786560, while the sum is 65.

The spelling of 1393806987056 in words is "one trillion, three hundred ninety-three billion, eight hundred six million, nine hundred eighty-seven thousand, fifty-six".