1565061056 has 28 divisors (see below), whose sum is σ = 3344567352. Its totient is φ = 722335488.

The previous prime is 1565061049. The next prime is 1565061083. The reversal of 1565061056 is 6501605651.

It is a super-2 number, since 2×1565061056² = 4898832218015670272, which contains 22 as substring.

It is a hoax number, since the sum of its digits (35) coincides with the sum of the digits of its distinct prime factors.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 939710 + ... + 941373.

It is an arithmetic number, because the mean of its divisors is an integer number (119448834).

Almost surely, 2^1565061056 is an apocalyptic number.

1565061056 is a gapful number since it is divisible by the number (16) formed by its first and last digit.

It is an amenable number.

1565061056 is an abundant number, since it is smaller than the sum of its proper divisors (1779506296).

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

1565061056 is a wasteful number, since it uses less digits than its factorization.

1565061056 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1881108 (or 1881098 counting only the distinct ones).

The product of its (nonzero) digits is 27000, while the sum is 35.

The square root of 1565061056 is about 39560.8525691750. The cubic root of 1565061056 is about 1161.0308553404.

The spelling of 1565061056 in words is "one billion, five hundred sixty-five million, sixty-one thousand, fifty-six".