1911538517056 has 105 divisors (see below), whose sum is σ = 4426402482839. Its totient is φ = 818998518912.

The previous prime is 1911538516967. The next prime is 1911538517081. The reversal of 1911538517056 is 6507158351191.

The square root of 1911538517056 is 1382584.

It is a perfect power (a square), and thus also a powerful number.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 1911538516994 and 1911538517012.

It is an unprimeable number.

It is a polite number, since it can be written in 14 ways as a sum of consecutive naturals, for example, 541971165 + ... + 541974691.

Almost surely, 2^{1911538517056} is an apocalyptic number.

1911538517056 is a gapful number since it is divisible by the number (16) formed by its first and last digit.

1911538517056 is the 1382584-th square number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 1911538517056

1911538517056 is an abundant number, since it is smaller than the sum of its proper divisors (2514863965783).

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

1911538517056 is an frugal number, since it uses more digits than its factorization.

1911538517056 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7094 (or 3536 counting only the distinct ones).

The product of its (nonzero) digits is 1134000, while the sum is 52.

The spelling of 1911538517056 in words is "one trillion, nine hundred eleven billion, five hundred thirty-eight million, five hundred seventeen thousand, fifty-six".