1071543864 has 64 divisors (see below), whose sum is σ = 2878848000. Its totient is φ = 331144704.

The previous prime is 1071543841. The next prime is 1071543901. The reversal of 1071543864 is 4683451701.

It is a super-2 number, since 2×1071543864² = 2296412504952100992, which contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 7737 + ... + 46935.

It is an arithmetic number, because the mean of its divisors is an integer number (44982000).

Almost surely, 2^1071543864 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 1071543864, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1439424000).

1071543864 is an abundant number, since it is smaller than the sum of its proper divisors (1807304136).

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

1071543864 is a wasteful number, since it uses less digits than its factorization.

1071543864 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 39292 (or 39288 counting only the distinct ones).

The product of its (nonzero) digits is 80640, while the sum is 39.

The square root of 1071543864 is about 32734.4446111432. Note that the first 3 decimals coincide. The cubic root of 1071543864 is about 1023.3008100330.

The spelling of 1071543864 in words is "one billion, seventy-one million, five hundred forty-three thousand, eight hundred sixty-four".