1061555264 has 84 divisors (see below), whose sum is σ = 2646346752. Its totient is φ = 413571840.

The previous prime is 1061555263. The next prime is 1061555273. The reversal of 1061555264 is 4625551601.

It is a super-2 number, since 2×1061555264² = 2253799157052219392, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (1061555263) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 44417 + ... + 63999.

It is an arithmetic number, because the mean of its divisors is an integer number (31504128).

Almost surely, 2^1061555264 is an apocalyptic number.

1061555264 is a gapful number since it is divisible by the number (14) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 1061555264, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1323173376).

1061555264 is an abundant number, since it is smaller than the sum of its proper divisors (1584791488).

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

1061555264 is a wasteful number, since it uses less digits than its factorization.

1061555264 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 19624 (or 19603 counting only the distinct ones).

The product of its (nonzero) digits is 36000, while the sum is 35.

The square root of 1061555264 is about 32581.5172145190. The cubic root of 1061555264 is about 1020.1112476381. Note that the first 3 decimals are identical.

The spelling of 1061555264 in words is "one billion, sixty-one million, five hundred fifty-five thousand, two hundred sixty-four".