1063521656 has 32 divisors (see below), whose sum is σ = 2190326400. Its totient is φ = 481868640.

The previous prime is 1063521653. The next prime is 1063521661. The reversal of 1063521656 is 6561253601.

It is a super-2 number, since 2×1063521656² = 2262156625561964672, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1063521653) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 148610 + ... + 155601.

It is an arithmetic number, because the mean of its divisors is an integer number (68447700).

Almost surely, 2^1063521656 is an apocalyptic number.

It is an amenable number.

1063521656 is an abundant number, since it is smaller than the sum of its proper divisors (1126804744).

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

1063521656 is a wasteful number, since it uses less digits than its factorization.

1063521656 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 304259 (or 304255 counting only the distinct ones).

The product of its (nonzero) digits is 32400, while the sum is 35.

The square root of 1063521656 is about 32611.6797482129. The cubic root of 1063521656 is about 1020.7407332485.

The spelling of 1063521656 in words is "one billion, sixty-three million, five hundred twenty-one thousand, six hundred fifty-six".