1043615664 has 200 divisors, whose sum is σ = 3717991200. Its totient is φ = 275208192.

The previous prime is 1043615653. The next prime is 1043615687. The reversal of 1043615664 is 4665163401.

It is a happy number.

1043615664 is a `hidden beast` number, since 10 + 436 + 156 + 64 = 666.

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

It is an unprimeable number.

It is a polite number, since it can be written in 39 ways as a sum of consecutive naturals, for example, 113512 + ... + 122360.

It is an arithmetic number, because the mean of its divisors is an integer number (18589956).

Almost surely, 2^1043615664 is an apocalyptic number.

1043615664 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 1043615664, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1858995600).

1043615664 is an abundant number, since it is smaller than the sum of its proper divisors (2674375536).

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

1043615664 is a wasteful number, since it uses less digits than its factorization.

1043615664 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8889 (or 8874 counting only the distinct ones).

The product of its (nonzero) digits is 51840, while the sum is 36.

The square root of 1043615664 is about 32305.0408450446. The cubic root of 1043615664 is about 1014.3321624586.

The spelling of 1043615664 in words is "one billion, forty-three million, six hundred fifteen thousand, six hundred sixty-four".