1556015055056 has 40 divisors (see below), whose sum is σ = 3758685720384. Its totient is φ = 606239631360.

The previous prime is 1556015055031. The next prime is 1556015055083. The reversal of 1556015055056 is 6505505106551.

It is a super-2 number, since 2×1556015055056² (a number of 25 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (44).

It is a junction number, because it is equal to n+sod(n) for n = 1556015054998 and 1556015055016.

It is a congruent number.

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 7 ways as a sum of consecutive naturals, for example, 631498385 + ... + 631500848.

Almost surely, 2^{1556015055056} is an apocalyptic number.

1556015055056 is a gapful number since it is divisible by the number (16) formed by its first and last digit.

It is an amenable number.

1556015055056 is an abundant number, since it is smaller than the sum of its proper divisors (2202670665328).

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

1556015055056 is a wasteful number, since it uses less digits than its factorization.

1556015055056 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1262999259 (or 1262999253 counting only the distinct ones).

The product of its (nonzero) digits is 562500, while the sum is 44.

The spelling of 1556015055056 in words is "one trillion, five hundred fifty-six billion, fifteen million, fifty-five thousand, fifty-six".