1071555552 has 72 divisors (see below), whose sum is σ = 3067810200. Its totient is φ = 354773760.

The previous prime is 1071555523. The next prime is 1071555593. The reversal of 1071555552 is 2555551701.

It is a tau number, because it is divible by the number of its divisors (72).

It is a super-2 number, since 2×1071555552² = 2296462602044049408, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (36).

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 in 11 ways as a sum of consecutive naturals, for example, 30427 + ... + 55397.

It is an arithmetic number, because the mean of its divisors is an integer number (42608475).

Almost surely, 2^1071555552 is an apocalyptic number.

1071555552 is a gapful number since it is divisible by the number (12) 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 1071555552, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1533905100).

1071555552 is an abundant number, since it is smaller than the sum of its proper divisors (1996254648).

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

1071555552 is a wasteful number, since it uses less digits than its factorization.

1071555552 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 25136 (or 25125 counting only the distinct ones).

The product of its (nonzero) digits is 43750, while the sum is 36.

The square root of 1071555552 is about 32734.6231382003. The cubic root of 1071555552 is about 1023.3045306138.

The spelling of 1071555552 in words is "one billion, seventy-one million, five hundred fifty-five thousand, five hundred fifty-two".