1056665215534 has 4 divisors (see below), whose sum is σ = 1584997823304. Its totient is φ = 528332607766.

The previous prime is 1056665215523. The next prime is 1056665215577. The reversal of 1056665215534 is 4355125666501.

It is a happy number.

It is a semiprime because it is the product of two primes.

It is a super-2 number, since 2×1056665215534² (a number of 25 digits) contains 22 as substring.

It is a congruent number.

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 as a sum of consecutive naturals, namely, 264166303882 + ... + 264166303885.

It is an arithmetic number, because the mean of its divisors is an integer number (396249455826).

Almost surely, 2^{1056665215534} is an apocalyptic number.

1056665215534 is a deficient number, since it is larger than the sum of its proper divisors (528332607770).

1056665215534 is an equidigital number, since it uses as much as digits as its factorization.

1056665215534 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 528332607769.

The product of its (nonzero) digits is 3240000, while the sum is 49.

The spelling of 1056665215534 in words is "one trillion, fifty-six billion, six hundred sixty-five million, two hundred fifteen thousand, five hundred thirty-four".